Merge branch 'master' of github.com:mcMMO-Dev/mcMMO into tridentsxbows

Changelog.txt

@@ -1,4 +1,4 @@
-Version 2.1.134
+Version 2.2.000
     New Skill - Tridents
     New Skill - Crossbows
 
@@ -49,6 +49,37 @@ Version 2.1.134
     Notes:
     These are the first new skills that I've written for mcMMO in about 9 years, I'll be listening closely to feedback and tweaking them often.
 
+Version 2.1.135
+    Furnaces no longer simulate block break checks when assigning ownership as it caused some unwanted plugin conflicts
+    Fixed an issue where Fishing would break if exploit protection was turned off for Fishing (Thanks Ineusia)
+    Fixed Super abilities not being translated on scoreboards (Thanks Ineusia)
+    Added option in advanced.yml to squelch ability activation messages being sent to other players via action bar (Thanks Ineusia)
+
+Version 2.1.134
+    Furnaces now change ownership to the last player who clicks in their inventory and is legally allowed to break the furnace
+    Smelting now has a Bonus Drops section in config.yml
+    Smelting now only doubles smelting results for items which have bonus drop entries in config.yml
+    Smelting XP can now be gained offline, but all other benefits from Smelting don't happen unless you're online
+    Fix brewing stand not consuming items (thanks Durburz)
+    Changed the UUID updater task to not catastrophically fail when requests failed
+    Fixed a bug where players could set each other on fire when partied or when PVP was disabled
+    Fixed a NPE that could happen with thrown potions
+    Fixed a potential NPE when damaging player armor with Axes
+    Fixed a potential NPE when damaging a player with Blast Mining
+    Fixed a potential NPE when checking tools related to Super Abilities
+    Fixed a potential NPE when checking the Chimaera Wing
+    Fixed a potential NPE when creating party member lists
+    Fixed a potential NPE when fishing
+    Fixed a potential NPE when players right click blocks
+    Fixed a locale mistake in locale hu_HU
+    Fixed a locale mistake in locale ru
+    Minor code cleanup
+
+    NOTES:
+    It used to be that Furnaces would assign an owner and that would be their owner until the server shutdown, now owners will change based on who last had their hands on the furnace.
+    You won't become the owner if you are not allowed to view the inventory of a furnace, or break the furnace, or interact with the contents of the furnace
+>>>>>>> a28d1cd537caddb07a27ba2b7dd0ed7a37b39a48
+
 Version 2.1.133
     A fix for an 'array out of bounds' error related to players clicking outside the inventory windows has been fixed
     French locale has been updated (thanks Elikill58)

extras/mods/1.6.x/extrabiomesxl.blocks.yml

@@ -99,10 +99,6 @@ Woodcutting:
         Double_Drops_Enabled: true
         Is_Log: true
     # Fir Quarters
-    X2209|1:
-        XP_Gain: 80
-        Double_Drops_Enabled: true
-        Is_Log: true
     X2211|1:
         XP_Gain: 100
         Double_Drops_Enabled: true
@@ -116,10 +112,6 @@ Woodcutting:
         Double_Drops_Enabled: true
         Is_Log: true        
     # Oak Quarters
-    X2209|2:
-        XP_Gain: 70
-        Double_Drops_Enabled: true
-        Is_Log: true
     X2211|2:
         XP_Gain: 100
         Double_Drops_Enabled: true
@@ -133,15 +125,7 @@ Woodcutting:
         Double_Drops_Enabled: true
         Is_Log: true
     # Acacia 
-    X2209|1:
-        XP_Gain: 80
-        Double_Drops_Enabled: true
-        Is_Log: true
-    # Cypress 
-    X2209|2:
-        XP_Gain: 90
-        Double_Drops_Enabled: true
-        Is_Log: true
+    # Cypress
     # Bald Cypress Quarter
     X2225|0:
         XP_Gain: 90

extras/mods/1.6.x/metallurgy3.tools.yml

@@ -366,25 +366,7 @@ Axes:
 ###
 Bows:
     #Bow_1
-    X999:
-        XP_Modifer: 1.0
-        Ability_Enabled: true
-        Tier: 1
-        Repairable: true
-        Repair_Material: X99
-        Repair_Material_Data_Value: 0
-        Repair_Material_Quantity: 9
-        Durability: 9999
     #Bow_2
-    X999:
-        XP_Modifer: 1.0
-        Ability_Enabled: true
-        Tier: 1
-        Repairable: true
-        Repair_Material: X99
-        Repair_Material_Data_Value: 0
-        Repair_Material_Quantity: 9
-        Durability: 9999
 
 #
 #  Settings for Hoes

extras/mods/1.6.x/twilightforest.armor.yml

@@ -68,17 +68,7 @@ Chestplates:
         Repair_Material_Quantity: 8
         Durability: 320
     # Knightmetal
-    X28035:
-        Repairable: true
-        Repair_Material: X28032
-        Repair_Material_Pretty_Name: "Knightmetal Ingot"
-        Repair_Material_Data_Value: 0
-        Repair_Material_Quantity: 8
-        Durability: 320
     # Phantom
-    X28035:
-        Repairable: false
-        Durability: 480
 
 Helmets:
     # Ironwood
@@ -106,17 +96,7 @@ Helmets:
         Repair_Material_Quantity: 5
         Durability: 220
     # Knightmetal
-    X28034:
-        Repairable: true
-        Repair_Material: X28032
-        Repair_Material_Pretty_Name: "Knightmetal Ingot"
-        Repair_Material_Data_Value: 0
-        Repair_Material_Quantity: 5
-        Durability: 220
     # Phantom
-    X28034:
-        Repairable: false
-        Durability: 330
 
 Leggings:
     # Ironwood

pom.xml

@@ -2,7 +2,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.gmail.nossr50.mcMMO</groupId>
     <artifactId>mcMMO</artifactId>
-    <version>2.1.134-SNAPSHOT</version>
+    <version>2.2.000-ALPHA-SNAPSHOT</version>
     <name>mcMMO</name>
     <url>https://github.com/mcMMO-Dev/mcMMO</url>
     <scm>

src/main/java/com/gmail/nossr50/api/PartyAPI.java

@@ -185,7 +185,7 @@ public final class PartyAPI {
      */
     @Deprecated
     public static List<OfflinePlayer> getOnlineAndOfflineMembers(Player player) {
-        List<OfflinePlayer> members = new ArrayList<OfflinePlayer>();
+        List<OfflinePlayer> members = new ArrayList<>();
 
         for (UUID memberUniqueId : PartyManager.getAllMembers(player).keySet()) {
             OfflinePlayer member = mcMMO.p.getServer().getOfflinePlayer(memberUniqueId);

src/main/java/com/gmail/nossr50/api/SkillAPI.java

@@ -82,7 +82,7 @@ public final class SkillAPI {
     }
 
     private static List<String> getListFromEnum(List<PrimarySkillType> skillsTypes) {
-        List<String> skills = new ArrayList<String>();
+        List<String> skills = new ArrayList<>();
 
         for (PrimarySkillType primarySkillType : skillsTypes) {
             skills.add(primarySkillType.name());

src/main/java/com/gmail/nossr50/chat/ChatManagerFactory.java

@@ -6,8 +6,8 @@ import org.bukkit.plugin.Plugin;
 import java.util.HashMap;
 
 public class ChatManagerFactory {
-    private static final HashMap<Plugin, AdminChatManager> adminChatManagers = new HashMap<Plugin, AdminChatManager>();
-    private static final HashMap<Plugin, PartyChatManager> partyChatManagers = new HashMap<Plugin, PartyChatManager>();
+    private static final HashMap<Plugin, AdminChatManager> adminChatManagers = new HashMap<>();
+    private static final HashMap<Plugin, PartyChatManager> partyChatManagers = new HashMap<>();
 
     public static ChatManager getChatManager(Plugin plugin, ChatMode mode) {
         switch (mode) {

src/main/java/com/gmail/nossr50/commands/MHDCommand.java

@@ -10,13 +10,14 @@ import com.google.common.collect.ImmutableList;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 public class MHDCommand implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (mcMMO.getDatabaseManager() instanceof SQLDatabaseManager) {
             SQLDatabaseManager m = (SQLDatabaseManager) mcMMO.getDatabaseManager();
             m.resetMobHealthSettings();
@@ -39,7 +40,7 @@ public class MHDCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         return ImmutableList.of();
     }
 }

src/main/java/com/gmail/nossr50/commands/McImportCommand.java

@@ -7,6 +7,7 @@ import org.bukkit.Material;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.*;
 import java.util.ArrayList;
@@ -17,15 +18,12 @@ public class McImportCommand implements CommandExecutor {
     int fileAmount;
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 0:
-                importModConfig();
-                return true;
-
-            default:
-                return false;
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 0) {
+            importModConfig();
+            return true;
         }
+        return false;
     }
 
     public boolean importModConfig() {
@@ -34,7 +32,7 @@ public class McImportCommand implements CommandExecutor {
         mcMMO.p.getLogger().info("Starting import of mod materials...");
         fileAmount = 0;
 
-        HashMap<ModConfigType, ArrayList<String>> materialNames = new HashMap<ModConfigType, ArrayList<String>>();
+        HashMap<ModConfigType, ArrayList<String>> materialNames = new HashMap<>();
 
         BufferedReader in = null;
 
@@ -66,11 +64,10 @@ public class McImportCommand implements CommandExecutor {
                 ModConfigType type = ModConfigType.getModConfigType(materialName);
 
                 if (!materialNames.containsKey(type)) {
-                    materialNames.put(type, new ArrayList<String>());
+                    materialNames.put(type, new ArrayList<>());
                 }
 
                 materialNames.get(type).add(materialName);
-                continue;
             }
         }
         catch (FileNotFoundException e) {
@@ -94,13 +91,13 @@ public class McImportCommand implements CommandExecutor {
 
     private void createOutput(HashMap<ModConfigType, ArrayList<String>> materialNames) {
         for (ModConfigType modConfigType : materialNames.keySet()) {
-            HashMap<String, ArrayList<String>> materialNamesType = new HashMap<String, ArrayList<String>>();
+            HashMap<String, ArrayList<String>> materialNamesType = new HashMap<>();
 
             for (String materialName : materialNames.get(modConfigType)) {
                 String modName = Misc.getModName(materialName);
 
                 if (!materialNamesType.containsKey(modName)) {
-                    materialNamesType.put(modName, new ArrayList<String>());
+                    materialNamesType.put(modName, new ArrayList<>());
                 }
 
                 materialNamesType.get(modName).add(materialName);
@@ -170,16 +167,10 @@ public class McImportCommand implements CommandExecutor {
 
                 out = new FileWriter(outputFile);
                 out.write(writer.toString());
-            }
-            catch (IOException e) {
+            } catch (Exception e) {
                 e.printStackTrace();
                 return;
-            }
-            catch (Exception e) {
-                e.printStackTrace();
-                return;
-            }
-            finally {
+            } finally {
                 tryClose(out);
                 fileAmount++;
             }
@@ -202,7 +193,7 @@ public class McImportCommand implements CommandExecutor {
     }
 
     private HashMap<String, ArrayList<String>> getConfigSectionsBlocks(String modName, HashMap<String, ArrayList<String>> materialNames) {
-        HashMap<String, ArrayList<String>> configSections = new HashMap<String, ArrayList<String>>();
+        HashMap<String, ArrayList<String>> configSections = new HashMap<>();
 
         // Go through all the materials and categorise them under a skill
         for (String materialName : materialNames.get(modName)) {
@@ -221,7 +212,7 @@ public class McImportCommand implements CommandExecutor {
             }
 
             if (!configSections.containsKey(skillName)) {
-                configSections.put(skillName, new ArrayList<String>());
+                configSections.put(skillName, new ArrayList<>());
             }
 
             ArrayList<String> skillContents = configSections.get(skillName);
@@ -241,7 +232,7 @@ public class McImportCommand implements CommandExecutor {
     }
 
     private HashMap<String, ArrayList<String>> getConfigSectionsTools(String modName, HashMap<String, ArrayList<String>> materialNames) {
-        HashMap<String, ArrayList<String>> configSections = new HashMap<String, ArrayList<String>>();
+        HashMap<String, ArrayList<String>> configSections = new HashMap<>();
 
         // Go through all the materials and categorise them under a tool type
         for (String materialName : materialNames.get(modName)) {
@@ -266,7 +257,7 @@ public class McImportCommand implements CommandExecutor {
             }
 
             if (!configSections.containsKey(toolType)) {
-                configSections.put(toolType, new ArrayList<String>());
+                configSections.put(toolType, new ArrayList<>());
             }
 
             ArrayList<String> skillContents = configSections.get(toolType);
@@ -281,7 +272,7 @@ public class McImportCommand implements CommandExecutor {
     }
 
     private HashMap<String, ArrayList<String>> getConfigSectionsArmor(String modName, HashMap<String, ArrayList<String>> materialNames) {
-        HashMap<String, ArrayList<String>> configSections = new HashMap<String, ArrayList<String>>();
+        HashMap<String, ArrayList<String>> configSections = new HashMap<>();
 
         // Go through all the materials and categorise them under an armor type
         for (String materialName : materialNames.get(modName)) {
@@ -300,7 +291,7 @@ public class McImportCommand implements CommandExecutor {
             }
 
             if (!configSections.containsKey(toolType)) {
-                configSections.put(toolType, new ArrayList<String>());
+                configSections.put(toolType, new ArrayList<>());
             }
 
             ArrayList<String> skillContents = configSections.get(toolType);
@@ -326,14 +317,14 @@ public class McImportCommand implements CommandExecutor {
     }
 
     private HashMap<String, ArrayList<String>> getConfigSectionsUnknown(String modName, HashMap<String, ArrayList<String>> materialNames) {
-        HashMap<String, ArrayList<String>> configSections = new HashMap<String, ArrayList<String>>();
+        HashMap<String, ArrayList<String>> configSections = new HashMap<>();
 
         // Go through all the materials and print them
         for (String materialName : materialNames.get(modName)) {
             String configKey = "UNIDENTIFIED";
 
             if (!configSections.containsKey(configKey)) {
-                configSections.put(configKey, new ArrayList<String>());
+                configSections.put(configKey, new ArrayList<>());
             }
 
             ArrayList<String> skillContents = configSections.get(configKey);

src/main/java/com/gmail/nossr50/commands/McconvertCommand.java

@@ -12,6 +12,7 @@ import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -22,12 +23,12 @@ public class McconvertCommand implements TabExecutor {
     private static final List<String> DATABASE_TYPES;
     private static final List<String> SUBCOMMANDS = ImmutableList.of("database", "experience");
 
-    private CommandExecutor databaseConvertCommand = new ConvertDatabaseCommand();
-    private CommandExecutor experienceConvertCommand = new ConvertExperienceCommand();
+    private final CommandExecutor databaseConvertCommand = new ConvertDatabaseCommand();
+    private final CommandExecutor experienceConvertCommand = new ConvertExperienceCommand();
 
     static {
-        ArrayList<String> formulaTypes = new ArrayList<String>();
-        ArrayList<String> databaseTypes = new ArrayList<String>();
+        ArrayList<String> formulaTypes = new ArrayList<>();
+        ArrayList<String> databaseTypes = new ArrayList<>();
 
         for (FormulaType type : FormulaType.values()) {
             formulaTypes.add(type.toString());
@@ -53,34 +54,31 @@ public class McconvertCommand implements TabExecutor {
     }
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 2:
-                if (args[0].equalsIgnoreCase("database") || args[0].equalsIgnoreCase("db")) {
-                    return databaseConvertCommand.onCommand(sender, command, label, args);
-                }
-                else if (args[0].equalsIgnoreCase("experience") || args[0].equalsIgnoreCase("xp") || args[1].equalsIgnoreCase("exp")) {
-                    return experienceConvertCommand.onCommand(sender, command, label, args);
-                }
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 2) {
+            if (args[0].equalsIgnoreCase("database") || args[0].equalsIgnoreCase("db")) {
+                return databaseConvertCommand.onCommand(sender, command, label, args);
+            } else if (args[0].equalsIgnoreCase("experience") || args[0].equalsIgnoreCase("xp") || args[1].equalsIgnoreCase("exp")) {
+                return experienceConvertCommand.onCommand(sender, command, label, args);
+            }
 
-                return false;
-            default:
-                return false;
+            return false;
         }
+        return false;
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         switch (args.length) {
             case 1:
-                return StringUtil.copyPartialMatches(args[0], SUBCOMMANDS, new ArrayList<String>(SUBCOMMANDS.size()));
+                return StringUtil.copyPartialMatches(args[0], SUBCOMMANDS, new ArrayList<>(SUBCOMMANDS.size()));
             case 2:
                 if (args[0].equalsIgnoreCase("database") || args[0].equalsIgnoreCase("db")) {
-                    return StringUtil.copyPartialMatches(args[0], DATABASE_TYPES, new ArrayList<String>(DATABASE_TYPES.size()));
+                    return StringUtil.copyPartialMatches(args[0], DATABASE_TYPES, new ArrayList<>(DATABASE_TYPES.size()));
                 }
 
                 if (args[0].equalsIgnoreCase("experience") || args[0].equalsIgnoreCase("xp") || args[0].equalsIgnoreCase("exp")) {
-                    return StringUtil.copyPartialMatches(args[0], FORMULA_TYPES, new ArrayList<String>(FORMULA_TYPES.size()));
+                    return StringUtil.copyPartialMatches(args[0], FORMULA_TYPES, new ArrayList<>(FORMULA_TYPES.size()));
                 }
 
                 return ImmutableList.of();

src/main/java/com/gmail/nossr50/commands/McmmoCommand.java

@@ -9,10 +9,11 @@ import org.bukkit.ChatColor;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
 
 public class McmmoCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         switch (args.length) {
             case 0:
                 if (!Permissions.mcmmoDescription(sender)) {

src/main/java/com/gmail/nossr50/commands/McnotifyCommand.java

@@ -9,35 +9,33 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 public class McnotifyCommand implements TabExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (CommandUtils.noConsoleUsage(sender)) {
             return true;
         }
 
-        switch (args.length) {
-            case 0:
-                McMMOPlayer mcMMOPlayer = UserManager.getPlayer((Player) sender);
+        if (args.length == 0) {
+            McMMOPlayer mcMMOPlayer = UserManager.getPlayer((Player) sender);
 
-                //Not Loaded yet
-                if(mcMMOPlayer == null)
-                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
+            //Not Loaded yet
+            if (mcMMOPlayer == null)
+                sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
 
-                sender.sendMessage(LocaleLoader.getString("Commands.Notifications." + (mcMMOPlayer.useChatNotifications() ? "Off" : "On")));
-                mcMMOPlayer.toggleChatNotifications();
-                return true;
-
-            default:
-                return false;
+            sender.sendMessage(LocaleLoader.getString("Commands.Notifications." + (mcMMOPlayer.useChatNotifications() ? "Off" : "On")));
+            mcMMOPlayer.toggleChatNotifications();
+            return true;
         }
+        return false;
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         return ImmutableList.of();
     }
 }

src/main/java/com/gmail/nossr50/commands/McscoreboardCommand.java

@@ -9,6 +9,7 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -17,7 +18,7 @@ public class McscoreboardCommand implements TabExecutor {
     private static final List<String> FIRST_ARGS = ImmutableList.of("keep", "time", "clear");
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (CommandUtils.noConsoleUsage(sender)) {
             return true;
         }
@@ -69,13 +70,11 @@ public class McscoreboardCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
-        switch (args.length) {
-            case 1:
-                return StringUtil.copyPartialMatches(args[0], FIRST_ARGS, new ArrayList<String>(FIRST_ARGS.size()));
-            default:
-                return ImmutableList.of();
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        if (args.length == 1) {
+            return StringUtil.copyPartialMatches(args[0], FIRST_ARGS, new ArrayList<>(FIRST_ARGS.size()));
         }
+        return ImmutableList.of();
     }
 
     private boolean help(CommandSender sender) {

src/main/java/com/gmail/nossr50/commands/ToggleCommand.java

@@ -8,13 +8,14 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
 
 public abstract class ToggleCommand implements TabExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         switch (args.length) {
             case 0:
                 if (CommandUtils.noConsoleUsage(sender)) {
@@ -60,14 +61,12 @@ public abstract class ToggleCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
-        switch (args.length) {
-            case 1:
-                List<String> playerNames = CommandUtils.getOnlinePlayerNames(sender);
-                return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<String>(playerNames.size()));
-            default:
-                return ImmutableList.of();
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        if (args.length == 1) {
+            List<String> playerNames = CommandUtils.getOnlinePlayerNames(sender);
+            return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<>(playerNames.size()));
         }
+        return ImmutableList.of();
     }
 
     protected abstract boolean hasOtherPermission(CommandSender sender);

src/main/java/com/gmail/nossr50/commands/XprateCommand.java

@@ -16,6 +16,7 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -24,7 +25,7 @@ public class XprateCommand implements TabExecutor {
     private final double ORIGINAL_XP_RATE = ExperienceConfig.getInstance().getExperienceGainsGlobalMultiplier();
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         switch (args.length) {
             case 1:
                 if (!args[0].equalsIgnoreCase("reset") &&  !args[0].equalsIgnoreCase("clear")) {
@@ -116,16 +117,16 @@ public class XprateCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         switch (args.length) {
             case 1:
                 if (StringUtils.isInt(args[0])) {
                     return ImmutableList.of();
                 }
 
-                return StringUtil.copyPartialMatches(args[0], CommandUtils.RESET_OPTIONS, new ArrayList<String>(CommandUtils.RESET_OPTIONS.size()));
+                return StringUtil.copyPartialMatches(args[0], CommandUtils.RESET_OPTIONS, new ArrayList<>(CommandUtils.RESET_OPTIONS.size()));
             case 2:
-                return StringUtil.copyPartialMatches(args[1], CommandUtils.TRUE_FALSE_OPTIONS, new ArrayList<String>(CommandUtils.TRUE_FALSE_OPTIONS.size()));
+                return StringUtil.copyPartialMatches(args[1], CommandUtils.TRUE_FALSE_OPTIONS, new ArrayList<>(CommandUtils.TRUE_FALSE_OPTIONS.size()));
             default:
                 return ImmutableList.of();
         }

src/main/java/com/gmail/nossr50/commands/admin/McmmoReloadLocaleCommand.java

@@ -5,26 +5,25 @@ import com.gmail.nossr50.util.Permissions;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * @author Mark Vainomaa
  */
 public final class McmmoReloadLocaleCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 0:
-                if (!Permissions.reloadlocale(sender)) {
-                    sender.sendMessage(command.getPermissionMessage());
-                    return true;
-                }
-
-                LocaleLoader.reloadLocale();
-                sender.sendMessage(LocaleLoader.getString("Locale.Reloaded"));
-
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 0) {
+            if (!Permissions.reloadlocale(sender)) {
+                sender.sendMessage(command.getPermissionMessage());
                 return true;
-            default:
-                return false;
+            }
+
+            LocaleLoader.reloadLocale();
+            sender.sendMessage(LocaleLoader.getString("Locale.Reloaded"));
+
+            return true;
         }
+        return false;
     }
 }

src/main/java/com/gmail/nossr50/commands/admin/PlayerDebugCommand.java

@@ -7,11 +7,12 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PlayerDebugCommand implements CommandExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if(sender instanceof Player) {
             McMMOPlayer mcMMOPlayer = UserManager.getPlayer((Player) sender);
             mcMMOPlayer.toggleDebugMode(); //Toggle debug mode

src/main/java/com/gmail/nossr50/commands/chat/ChatCommand.java

@@ -16,12 +16,13 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
 
 public abstract class ChatCommand implements TabExecutor {
-    private ChatMode chatMode;
+    private final ChatMode chatMode;
     protected ChatManager chatManager;
 
     public ChatCommand(ChatMode chatMode) {
@@ -30,7 +31,7 @@ public abstract class ChatCommand implements TabExecutor {
     }
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         McMMOPlayer mcMMOPlayer;
 
         switch (args.length) {
@@ -88,13 +89,11 @@ public abstract class ChatCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
-        switch (args.length) {
-            case 1:
-                return StringUtil.copyPartialMatches(args[0], CommandUtils.TRUE_FALSE_OPTIONS, new ArrayList<String>(CommandUtils.TRUE_FALSE_OPTIONS.size()));
-            default:
-                return ImmutableList.of();
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        if (args.length == 1) {
+            return StringUtil.copyPartialMatches(args[0], CommandUtils.TRUE_FALSE_OPTIONS, new ArrayList<>(CommandUtils.TRUE_FALSE_OPTIONS.size()));
         }
+        return ImmutableList.of();
     }
 
     protected String buildChatMessage(String[] args, int index) {

src/main/java/com/gmail/nossr50/commands/database/ConvertDatabaseCommand.java

@@ -13,62 +13,59 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class ConvertDatabaseCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 2:
-                DatabaseType previousType = DatabaseType.getDatabaseType(args[1]);
-                DatabaseType newType = mcMMO.getDatabaseManager().getDatabaseType();
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 2) {
+            DatabaseType previousType = DatabaseType.getDatabaseType(args[1]);
+            DatabaseType newType = mcMMO.getDatabaseManager().getDatabaseType();
 
-                if (previousType == newType || (newType == DatabaseType.CUSTOM && DatabaseManagerFactory.getCustomDatabaseManagerClass().getSimpleName().equalsIgnoreCase(args[1]))) {
-                    sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Database.Same", newType.toString()));
-                    return true;
-                }
+            if (previousType == newType || (newType == DatabaseType.CUSTOM && DatabaseManagerFactory.getCustomDatabaseManagerClass().getSimpleName().equalsIgnoreCase(args[1]))) {
+                sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Database.Same", newType.toString()));
+                return true;
+            }
 
-                DatabaseManager oldDatabase = DatabaseManagerFactory.createDatabaseManager(previousType);
+            DatabaseManager oldDatabase = DatabaseManagerFactory.createDatabaseManager(previousType);
 
-                if (previousType == DatabaseType.CUSTOM) {
-                    Class<?> clazz;
+            if (previousType == DatabaseType.CUSTOM) {
+                Class<?> clazz;
 
-                    try {
-                        clazz = Class.forName(args[1]);
+                try {
+                    clazz = Class.forName(args[1]);
 
-                        if (!DatabaseManager.class.isAssignableFrom(clazz)) {
-                            sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Database.InvalidType", args[1]));
-                            return true;
-                        }
-
-                        oldDatabase = DatabaseManagerFactory.createCustomDatabaseManager((Class<? extends DatabaseManager>) clazz);
-                    }
-                    catch (Throwable e) {
-                        e.printStackTrace();
+                    if (!DatabaseManager.class.isAssignableFrom(clazz)) {
                         sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Database.InvalidType", args[1]));
                         return true;
                     }
+
+                    oldDatabase = DatabaseManagerFactory.createCustomDatabaseManager((Class<? extends DatabaseManager>) clazz);
+                } catch (Throwable e) {
+                    e.printStackTrace();
+                    sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Database.InvalidType", args[1]));
+                    return true;
+                }
+            }
+
+            sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Database.Start", previousType.toString(), newType.toString()));
+
+            UserManager.saveAll();
+            UserManager.clearAll();
+
+            for (Player player : mcMMO.p.getServer().getOnlinePlayers()) {
+                PlayerProfile profile = oldDatabase.loadPlayerProfile(player.getUniqueId());
+
+                if (profile.isLoaded()) {
+                    mcMMO.getDatabaseManager().saveUser(profile);
                 }
 
-                sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Database.Start", previousType.toString(), newType.toString()));
+                new PlayerProfileLoadingTask(player).runTaskLaterAsynchronously(mcMMO.p, 1); // 1 Tick delay to ensure the player is marked as online before we begin loading
+            }
 
-                UserManager.saveAll();
-                UserManager.clearAll();
-
-                for (Player player : mcMMO.p.getServer().getOnlinePlayers()) {
-                    PlayerProfile profile = oldDatabase.loadPlayerProfile(player.getUniqueId());
-
-                    if (profile.isLoaded()) {
-                        mcMMO.getDatabaseManager().saveUser(profile);
-                    }
-
-                    new PlayerProfileLoadingTask(player).runTaskLaterAsynchronously(mcMMO.p, 1); // 1 Tick delay to ensure the player is marked as online before we begin loading
-                }
-
-                new DatabaseConversionTask(oldDatabase, sender, previousType.toString(), newType.toString()).runTaskAsynchronously(mcMMO.p);
-                return true;
-
-            default:
-                return false;
+            new DatabaseConversionTask(oldDatabase, sender, previousType.toString(), newType.toString()).runTaskAsynchronously(mcMMO.p);
+            return true;
         }
+        return false;
     }
 }

src/main/java/com/gmail/nossr50/commands/database/McpurgeCommand.java

@@ -7,30 +7,28 @@ import com.google.common.collect.ImmutableList;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 public class McpurgeCommand implements TabExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 0:
-                mcMMO.getDatabaseManager().purgePowerlessUsers();
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 0) {
+            mcMMO.getDatabaseManager().purgePowerlessUsers();
 
-                if (Config.getInstance().getOldUsersCutoff() != -1) {
-                    mcMMO.getDatabaseManager().purgeOldUsers();
-                }
+            if (Config.getInstance().getOldUsersCutoff() != -1) {
+                mcMMO.getDatabaseManager().purgeOldUsers();
+            }
 
-                sender.sendMessage(LocaleLoader.getString("Commands.mcpurge.Success"));
-                return true;
-
-            default:
-                return false;
+            sender.sendMessage(LocaleLoader.getString("Commands.mcpurge.Success"));
+            return true;
         }
+        return false;
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         return ImmutableList.of();
     }
 }

src/main/java/com/gmail/nossr50/commands/database/McremoveCommand.java

@@ -10,6 +10,7 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -17,43 +18,37 @@ import java.util.UUID;
 
 public class McremoveCommand implements TabExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 1:
-                String playerName = CommandUtils.getMatchedPlayerName(args[0]);
-
-                if (UserManager.getOfflinePlayer(playerName) == null && CommandUtils.unloadedProfile(sender, mcMMO.getDatabaseManager().loadPlayerProfile(playerName, false))) {
-                    return true;
-                }
-
-                UUID uuid = null;
-
-                if(Bukkit.getPlayer(playerName) != null) {
-                    uuid = Bukkit.getPlayer(playerName).getUniqueId();
-                }
-
-                if (mcMMO.getDatabaseManager().removeUser(playerName, uuid)) {
-                    sender.sendMessage(LocaleLoader.getString("Commands.mcremove.Success", playerName));
-                }
-                else {
-                    sender.sendMessage(playerName + " could not be removed from the database."); // Pretty sure this should NEVER happen.
-                }
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 1) {
+            String playerName = CommandUtils.getMatchedPlayerName(args[0]);
 
+            if (UserManager.getOfflinePlayer(playerName) == null && CommandUtils.unloadedProfile(sender, mcMMO.getDatabaseManager().loadPlayerProfile(playerName, false))) {
                 return true;
+            }
 
-            default:
-                return false;
+            UUID uuid = null;
+
+            if (Bukkit.getPlayer(playerName) != null) {
+                uuid = Bukkit.getPlayer(playerName).getUniqueId();
+            }
+
+            if (mcMMO.getDatabaseManager().removeUser(playerName, uuid)) {
+                sender.sendMessage(LocaleLoader.getString("Commands.mcremove.Success", playerName));
+            } else {
+                sender.sendMessage(playerName + " could not be removed from the database."); // Pretty sure this should NEVER happen.
+            }
+
+            return true;
         }
+        return false;
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
-        switch (args.length) {
-            case 1:
-                List<String> playerNames = CommandUtils.getOnlinePlayerNames(sender);
-                return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<String>(playerNames.size()));
-            default:
-                return ImmutableList.of();
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        if (args.length == 1) {
+            List<String> playerNames = CommandUtils.getOnlinePlayerNames(sender);
+            return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<>(playerNames.size()));
         }
+        return ImmutableList.of();
     }
 }

src/main/java/com/gmail/nossr50/commands/database/MmoshowdbCommand.java

@@ -7,31 +7,29 @@ import com.google.common.collect.ImmutableList;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 public class MmoshowdbCommand implements TabExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 0:
-                Class<?> clazz = DatabaseManagerFactory.getCustomDatabaseManagerClass();
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 0) {
+            Class<?> clazz = DatabaseManagerFactory.getCustomDatabaseManagerClass();
 
-                if (clazz != null) {
-                    sender.sendMessage(LocaleLoader.getString("Commands.mmoshowdb", clazz.getName()));
-                    return true;
-                }
-
-                sender.sendMessage(LocaleLoader.getString("Commands.mmoshowdb", (Config.getInstance().getUseMySQL() ? "sql" : "flatfile")));
+            if (clazz != null) {
+                sender.sendMessage(LocaleLoader.getString("Commands.mmoshowdb", clazz.getName()));
                 return true;
+            }
 
-            default:
-                return false;
+            sender.sendMessage(LocaleLoader.getString("Commands.mmoshowdb", (Config.getInstance().getUseMySQL() ? "sql" : "flatfile")));
+            return true;
         }
+        return false;
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         return ImmutableList.of();
     }
 }

src/main/java/com/gmail/nossr50/commands/experience/ConvertExperienceCommand.java

@@ -10,42 +10,40 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Locale;
 
 public class ConvertExperienceCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 2:
-                FormulaType previousType = mcMMO.getFormulaManager().getPreviousFormulaType();
-                FormulaType newType = FormulaType.getFormulaType(args[1].toUpperCase(Locale.ENGLISH));
-
-                if (newType == FormulaType.UNKNOWN) {
-                    sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Experience.Invalid"));
-                    return true;
-                }
-
-                if (previousType == newType) {
-                    sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Experience.Same", newType.toString()));
-                    return true;
-                }
-
-                sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Experience.Start", previousType.toString(), newType.toString()));
-
-                UserManager.saveAll();
-                UserManager.clearAll();
-
-                new FormulaConversionTask(sender, newType).runTaskLater(mcMMO.p, 1);
-
-                for (Player player : mcMMO.p.getServer().getOnlinePlayers()) {
-                    new PlayerProfileLoadingTask(player).runTaskLaterAsynchronously(mcMMO.p, 1); // 1 Tick delay to ensure the player is marked as online before we begin loading
-                }
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 2) {
+            FormulaType previousType = mcMMO.getFormulaManager().getPreviousFormulaType();
+            FormulaType newType = FormulaType.getFormulaType(args[1].toUpperCase(Locale.ENGLISH));
 
+            if (newType == FormulaType.UNKNOWN) {
+                sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Experience.Invalid"));
                 return true;
+            }
 
-            default:
-                return false;
+            if (previousType == newType) {
+                sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Experience.Same", newType.toString()));
+                return true;
+            }
+
+            sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Experience.Start", previousType.toString(), newType.toString()));
+
+            UserManager.saveAll();
+            UserManager.clearAll();
+
+            new FormulaConversionTask(sender, newType).runTaskLater(mcMMO.p, 1);
+
+            for (Player player : mcMMO.p.getServer().getOnlinePlayers()) {
+                new PlayerProfileLoadingTask(player).runTaskLaterAsynchronously(mcMMO.p, 1); // 1 Tick delay to ensure the player is marked as online before we begin loading
+            }
+
+            return true;
         }
+        return false;
     }
 }

src/main/java/com/gmail/nossr50/commands/experience/ExperienceCommand.java

@@ -14,6 +14,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -21,7 +22,7 @@ import java.util.UUID;
 
 public abstract class ExperienceCommand implements TabExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         PrimarySkillType skill;
 
         switch (args.length) {
@@ -119,13 +120,13 @@ public abstract class ExperienceCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         switch (args.length) {
             case 1:
                 List<String> playerNames = CommandUtils.getOnlinePlayerNames(sender);
-                return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<String>(playerNames.size()));
+                return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<>(playerNames.size()));
             case 2:
-                return StringUtil.copyPartialMatches(args[1], PrimarySkillType.SKILL_NAMES, new ArrayList<String>(PrimarySkillType.SKILL_NAMES.size()));
+                return StringUtil.copyPartialMatches(args[1], PrimarySkillType.SKILL_NAMES, new ArrayList<>(PrimarySkillType.SKILL_NAMES.size()));
             default:
                 return ImmutableList.of();
         }

src/main/java/com/gmail/nossr50/commands/experience/SkillresetCommand.java

@@ -17,6 +17,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -28,7 +29,7 @@ import java.util.UUID;
  */
 public class SkillresetCommand implements TabExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         PrimarySkillType skill;
         switch (args.length) {
             case 1:
@@ -103,13 +104,13 @@ public class SkillresetCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         switch (args.length) {
             case 1:
                 List<String> playerNames = CommandUtils.getOnlinePlayerNames(sender);
-                return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<String>(playerNames.size()));
+                return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<>(playerNames.size()));
             case 2:
-                return StringUtil.copyPartialMatches(args[1], PrimarySkillType.SKILL_NAMES, new ArrayList<String>(PrimarySkillType.SKILL_NAMES.size()));
+                return StringUtil.copyPartialMatches(args[1], PrimarySkillType.SKILL_NAMES, new ArrayList<>(PrimarySkillType.SKILL_NAMES.size()));
             default:
                 return ImmutableList.of();
         }

src/main/java/com/gmail/nossr50/commands/hardcore/HardcoreModeCommand.java

@@ -9,6 +9,7 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.text.DecimalFormat;
 import java.util.ArrayList;
@@ -18,7 +19,7 @@ public abstract class HardcoreModeCommand implements TabExecutor {
     protected final DecimalFormat percent = new DecimalFormat("##0.00%");
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         switch (args.length) {
             case 0:
                 if (!checkTogglePermissions(sender)) {
@@ -108,17 +109,15 @@ public abstract class HardcoreModeCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
-        switch (args.length) {
-            case 1:
-                if (StringUtils.isDouble(args[0])) {
-                    return ImmutableList.of();
-                }
-
-                return StringUtil.copyPartialMatches(args[0], CommandUtils.TRUE_FALSE_OPTIONS, new ArrayList<String>(CommandUtils.TRUE_FALSE_OPTIONS.size()));
-            default:
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        if (args.length == 1) {
+            if (StringUtils.isDouble(args[0])) {
                 return ImmutableList.of();
+            }
+
+            return StringUtil.copyPartialMatches(args[0], CommandUtils.TRUE_FALSE_OPTIONS, new ArrayList<>(CommandUtils.TRUE_FALSE_OPTIONS.size()));
         }
+        return ImmutableList.of();
     }
 
     protected abstract boolean checkTogglePermissions(CommandSender sender);

src/main/java/com/gmail/nossr50/commands/party/PartyAcceptCommand.java

@@ -8,40 +8,37 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyAcceptCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 1:
-                Player player = (Player) sender;
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 1) {
+            Player player = (Player) sender;
 
-                //Check if player profile is loaded
-                if(UserManager.getPlayer(player) == null)
-                {
-                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
-                    return true;
-                }
-
-                McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
-
-
-                if (!mcMMOPlayer.hasPartyInvite()) {
-                    sender.sendMessage(LocaleLoader.getString("mcMMO.NoInvites"));
-                    return true;
-                }
-
-                // Changing parties
-                if (!PartyManager.changeOrJoinParty(mcMMOPlayer, mcMMOPlayer.getPartyInvite().getName())) {
-                    return true;
-                }
-
-                PartyManager.joinInvitedParty(mcMMOPlayer);
+            //Check if player profile is loaded
+            if (UserManager.getPlayer(player) == null) {
+                sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
                 return true;
+            }
 
-            default:
-                sender.sendMessage(LocaleLoader.getString("Commands.Usage.1", "party", "accept"));
+            McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
+
+
+            if (!mcMMOPlayer.hasPartyInvite()) {
+                sender.sendMessage(LocaleLoader.getString("mcMMO.NoInvites"));
                 return true;
+            }
+
+            // Changing parties
+            if (!PartyManager.changeOrJoinParty(mcMMOPlayer, mcMMOPlayer.getPartyInvite().getName())) {
+                return true;
+            }
+
+            PartyManager.joinInvitedParty(mcMMOPlayer);
+            return true;
         }
+        sender.sendMessage(LocaleLoader.getString("Commands.Usage.1", "party", "accept"));
+        return true;
     }
 }

src/main/java/com/gmail/nossr50/commands/party/PartyChangeOwnerCommand.java

@@ -11,34 +11,30 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyChangeOwnerCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 2:
-                //Check if player profile is loaded
-                if(UserManager.getPlayer((Player) sender) == null)
-                {
-                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
-                    return true;
-                }
-
-                Party playerParty = UserManager.getPlayer((Player) sender).getParty();
-                String targetName = CommandUtils.getMatchedPlayerName(args[1]);
-                OfflinePlayer target = mcMMO.p.getServer().getOfflinePlayer(targetName);
-
-                if (!playerParty.hasMember(target.getUniqueId())) {
-                    sender.sendMessage(LocaleLoader.getString("Party.NotInYourParty", targetName));
-                    return true;
-                }
-
-                PartyManager.setPartyLeader(target.getUniqueId(), playerParty);
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 2) {//Check if player profile is loaded
+            if (UserManager.getPlayer((Player) sender) == null) {
+                sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
                 return true;
+            }
 
-            default:
-                sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "owner", "<" + LocaleLoader.getString("Commands.Usage.Player") + ">"));
+            Party playerParty = UserManager.getPlayer((Player) sender).getParty();
+            String targetName = CommandUtils.getMatchedPlayerName(args[1]);
+            OfflinePlayer target = mcMMO.p.getServer().getOfflinePlayer(targetName);
+
+            if (!playerParty.hasMember(target.getUniqueId())) {
+                sender.sendMessage(LocaleLoader.getString("Party.NotInYourParty", targetName));
                 return true;
+            }
+
+            PartyManager.setPartyLeader(target.getUniqueId(), playerParty);
+            return true;
         }
+        sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "owner", "<" + LocaleLoader.getString("Commands.Usage.Player") + ">"));
+        return true;
     }
 }

src/main/java/com/gmail/nossr50/commands/party/PartyChangePasswordCommand.java

@@ -7,10 +7,11 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyChangePasswordCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if(UserManager.getPlayer((Player) sender) == null)
         {
             sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));

src/main/java/com/gmail/nossr50/commands/party/PartyCommand.java

@@ -16,6 +16,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -28,7 +29,7 @@ public class PartyCommand implements TabExecutor {
     private static final List<String> ITEMSHARE_COMPLETIONS = ImmutableList.of("none", "equal", "random", "loot", "mining", "herbalism", "woodcutting", "misc");
 
     static {
-        ArrayList<String> subcommands = new ArrayList<String>();
+        ArrayList<String> subcommands = new ArrayList<>();
 
         for (PartySubcommandType subcommand : PartySubcommandType.values()) {
             subcommands.add(subcommand.toString());
@@ -38,27 +39,27 @@ public class PartyCommand implements TabExecutor {
         PARTY_SUBCOMMANDS = ImmutableList.copyOf(subcommands);
     }
 
-    private CommandExecutor partyJoinCommand           = new PartyJoinCommand();
-    private CommandExecutor partyAcceptCommand         = new PartyAcceptCommand();
-    private CommandExecutor partyCreateCommand         = new PartyCreateCommand();
-    private CommandExecutor partyQuitCommand           = new PartyQuitCommand();
-    private CommandExecutor partyXpShareCommand        = new PartyXpShareCommand();
-    private CommandExecutor partyItemShareCommand      = new PartyItemShareCommand();
-    private CommandExecutor partyInviteCommand         = new PartyInviteCommand();
-    private CommandExecutor partyKickCommand           = new PartyKickCommand();
-    private CommandExecutor partyDisbandCommand        = new PartyDisbandCommand();
-    private CommandExecutor partyChangeOwnerCommand    = new PartyChangeOwnerCommand();
-    private CommandExecutor partyLockCommand           = new PartyLockCommand();
-    private CommandExecutor partyChangePasswordCommand = new PartyChangePasswordCommand();
-    private CommandExecutor partyRenameCommand         = new PartyRenameCommand();
-    private CommandExecutor partyInfoCommand           = new PartyInfoCommand();
-    private CommandExecutor partyHelpCommand           = new PartyHelpCommand();
-    private CommandExecutor partyTeleportCommand       = new PtpCommand();
-    private CommandExecutor partyChatCommand           = new PartyChatCommand();
-    private CommandExecutor partyAllianceCommand       = new PartyAllianceCommand();
+    private final CommandExecutor partyJoinCommand           = new PartyJoinCommand();
+    private final CommandExecutor partyAcceptCommand         = new PartyAcceptCommand();
+    private final CommandExecutor partyCreateCommand         = new PartyCreateCommand();
+    private final CommandExecutor partyQuitCommand           = new PartyQuitCommand();
+    private final CommandExecutor partyXpShareCommand        = new PartyXpShareCommand();
+    private final CommandExecutor partyItemShareCommand      = new PartyItemShareCommand();
+    private final CommandExecutor partyInviteCommand         = new PartyInviteCommand();
+    private final CommandExecutor partyKickCommand           = new PartyKickCommand();
+    private final CommandExecutor partyDisbandCommand        = new PartyDisbandCommand();
+    private final CommandExecutor partyChangeOwnerCommand    = new PartyChangeOwnerCommand();
+    private final CommandExecutor partyLockCommand           = new PartyLockCommand();
+    private final CommandExecutor partyChangePasswordCommand = new PartyChangePasswordCommand();
+    private final CommandExecutor partyRenameCommand         = new PartyRenameCommand();
+    private final CommandExecutor partyInfoCommand           = new PartyInfoCommand();
+    private final CommandExecutor partyHelpCommand           = new PartyHelpCommand();
+    private final CommandExecutor partyTeleportCommand       = new PtpCommand();
+    private final CommandExecutor partyChatCommand           = new PartyChatCommand();
+    private final CommandExecutor partyAllianceCommand       = new PartyAllianceCommand();
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (CommandUtils.noConsoleUsage(sender)) {
             return true;
         }
@@ -171,10 +172,10 @@ public class PartyCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         switch (args.length) {
             case 1:
-                return StringUtil.copyPartialMatches(args[0], PARTY_SUBCOMMANDS, new ArrayList<String>(PARTY_SUBCOMMANDS.size()));
+                return StringUtil.copyPartialMatches(args[0], PARTY_SUBCOMMANDS, new ArrayList<>(PARTY_SUBCOMMANDS.size()));
             case 2:
                 PartySubcommandType subcommand = PartySubcommandType.getSubcommand(args[0]);
 
@@ -188,18 +189,18 @@ public class PartyCommand implements TabExecutor {
                     case KICK:
                     case OWNER:
                         List<String> playerNames = CommandUtils.getOnlinePlayerNames(sender);
-                        return StringUtil.copyPartialMatches(args[1], playerNames, new ArrayList<String>(playerNames.size()));
+                        return StringUtil.copyPartialMatches(args[1], playerNames, new ArrayList<>(playerNames.size()));
                     case XPSHARE:
-                        return StringUtil.copyPartialMatches(args[1], XPSHARE_COMPLETIONS, new ArrayList<String>(XPSHARE_COMPLETIONS.size()));
+                        return StringUtil.copyPartialMatches(args[1], XPSHARE_COMPLETIONS, new ArrayList<>(XPSHARE_COMPLETIONS.size()));
                     case ITEMSHARE:
-                        return StringUtil.copyPartialMatches(args[1], ITEMSHARE_COMPLETIONS, new ArrayList<String>(ITEMSHARE_COMPLETIONS.size()));
+                        return StringUtil.copyPartialMatches(args[1], ITEMSHARE_COMPLETIONS, new ArrayList<>(ITEMSHARE_COMPLETIONS.size()));
                     case LOCK:
                     case CHAT:
-                        return StringUtil.copyPartialMatches(args[1], CommandUtils.TRUE_FALSE_OPTIONS, new ArrayList<String>(CommandUtils.TRUE_FALSE_OPTIONS.size()));
+                        return StringUtil.copyPartialMatches(args[1], CommandUtils.TRUE_FALSE_OPTIONS, new ArrayList<>(CommandUtils.TRUE_FALSE_OPTIONS.size()));
                     case PASSWORD:
-                        return StringUtil.copyPartialMatches(args[1], CommandUtils.RESET_OPTIONS, new ArrayList<String>(CommandUtils.RESET_OPTIONS.size()));
+                        return StringUtil.copyPartialMatches(args[1], CommandUtils.RESET_OPTIONS, new ArrayList<>(CommandUtils.RESET_OPTIONS.size()));
                     case TELEPORT:
-                        List<String> matches = StringUtil.copyPartialMatches(args[1], PtpCommand.TELEPORT_SUBCOMMANDS, new ArrayList<String>(PtpCommand.TELEPORT_SUBCOMMANDS.size()));
+                        List<String> matches = StringUtil.copyPartialMatches(args[1], PtpCommand.TELEPORT_SUBCOMMANDS, new ArrayList<>(PtpCommand.TELEPORT_SUBCOMMANDS.size()));
 
                         if (matches.size() == 0) {
                             Player player = (Player) sender;
@@ -214,7 +215,7 @@ public class PartyCommand implements TabExecutor {
                             Party party = UserManager.getPlayer(player).getParty();
 
                             playerNames = party.getOnlinePlayerNames(player);
-                            return StringUtil.copyPartialMatches(args[1], playerNames, new ArrayList<String>(playerNames.size()));
+                            return StringUtil.copyPartialMatches(args[1], playerNames, new ArrayList<>(playerNames.size()));
                         }
 
                         return matches;
@@ -223,7 +224,7 @@ public class PartyCommand implements TabExecutor {
                 }
             case 3:
                 if (PartySubcommandType.getSubcommand(args[0]) == PartySubcommandType.ITEMSHARE && isItemShareCategory(args[1])) {
-                    return StringUtil.copyPartialMatches(args[2], CommandUtils.TRUE_FALSE_OPTIONS, new ArrayList<String>(CommandUtils.TRUE_FALSE_OPTIONS.size()));
+                    return StringUtil.copyPartialMatches(args[2], CommandUtils.TRUE_FALSE_OPTIONS, new ArrayList<>(CommandUtils.TRUE_FALSE_OPTIONS.size()));
                 }
 
                 return ImmutableList.of();

src/main/java/com/gmail/nossr50/commands/party/PartyCreateCommand.java

@@ -8,10 +8,11 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyCreateCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         switch (args.length) {
             case 2:
             case 3:

src/main/java/com/gmail/nossr50/commands/party/PartyDisbandCommand.java

@@ -9,35 +9,32 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyDisbandCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 1:
-                if(UserManager.getPlayer((Player) sender) == null)
-                {
-                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 1) {
+            if (UserManager.getPlayer((Player) sender) == null) {
+                sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
+                return true;
+            }
+
+            Party playerParty = UserManager.getPlayer((Player) sender).getParty();
+            String partyName = playerParty.getName();
+
+            for (Player member : playerParty.getOnlineMembers()) {
+                if (!PartyManager.handlePartyChangeEvent(member, partyName, null, EventReason.KICKED_FROM_PARTY)) {
                     return true;
                 }
 
-                Party playerParty = UserManager.getPlayer((Player) sender).getParty();
-                String partyName = playerParty.getName();
+                member.sendMessage(LocaleLoader.getString("Party.Disband"));
+            }
 
-                for (Player member : playerParty.getOnlineMembers()) {
-                    if (!PartyManager.handlePartyChangeEvent(member, partyName, null, EventReason.KICKED_FROM_PARTY)) {
-                        return true;
-                    }
-
-                    member.sendMessage(LocaleLoader.getString("Party.Disband"));
-                }
-
-                PartyManager.disbandParty(playerParty);
-                return true;
-
-            default:
-                sender.sendMessage(LocaleLoader.getString("Commands.Usage.1", "party", "disband"));
-                return true;
+            PartyManager.disbandParty(playerParty);
+            return true;
         }
+        sender.sendMessage(LocaleLoader.getString("Commands.Usage.1", "party", "disband"));
+        return true;
     }
 }

src/main/java/com/gmail/nossr50/commands/party/PartyHelpCommand.java

@@ -4,27 +4,25 @@ import com.gmail.nossr50.locale.LocaleLoader;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyHelpCommand implements CommandExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 1:
-                sender.sendMessage(LocaleLoader.getString("Party.Help.3", "/party join", "/party quit"));
-                sender.sendMessage(LocaleLoader.getString("Party.Help.1", "/party create"));
-                sender.sendMessage(LocaleLoader.getString("Party.Help.4", "/party <lock|unlock>"));
-                sender.sendMessage(LocaleLoader.getString("Party.Help.5", "/party password"));
-                sender.sendMessage(LocaleLoader.getString("Party.Help.6", "/party kick"));
-                sender.sendMessage(LocaleLoader.getString("Party.Help.7", "/party leader"));
-                sender.sendMessage(LocaleLoader.getString("Party.Help.8", "/party disband"));
-                sender.sendMessage(LocaleLoader.getString("Party.Help.9", "/party itemshare"));
-                sender.sendMessage(LocaleLoader.getString("Party.Help.10", "/party xpshare"));
-                return true;
-
-            default:
-                sender.sendMessage(LocaleLoader.getString("Commands.Usage.1", "party", "help"));
-                return true;
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 1) {
+            sender.sendMessage(LocaleLoader.getString("Party.Help.3", "/party join", "/party quit"));
+            sender.sendMessage(LocaleLoader.getString("Party.Help.1", "/party create"));
+            sender.sendMessage(LocaleLoader.getString("Party.Help.4", "/party <lock|unlock>"));
+            sender.sendMessage(LocaleLoader.getString("Party.Help.5", "/party password"));
+            sender.sendMessage(LocaleLoader.getString("Party.Help.6", "/party kick"));
+            sender.sendMessage(LocaleLoader.getString("Party.Help.7", "/party leader"));
+            sender.sendMessage(LocaleLoader.getString("Party.Help.8", "/party disband"));
+            sender.sendMessage(LocaleLoader.getString("Party.Help.9", "/party itemshare"));
+            sender.sendMessage(LocaleLoader.getString("Party.Help.10", "/party xpshare"));
+            return true;
         }
+        sender.sendMessage(LocaleLoader.getString("Commands.Usage.1", "party", "help"));
+        return true;
     }
 }

src/main/java/com/gmail/nossr50/commands/party/PartyInfoCommand.java

@@ -13,13 +13,14 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
 
 public class PartyInfoCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         switch (args.length) {
             case 0:
             case 1:
@@ -60,8 +61,8 @@ public class PartyInfoCommand implements CommandExecutor {
     private void displayPartyFeatures(Player player, Party party) {
         player.sendMessage(LocaleLoader.getString("Commands.Party.Features.Header"));
 
-        List<String> unlockedPartyFeatures = new ArrayList<String>();
-        List<String> lockedPartyFeatures = new ArrayList<String>();
+        List<String> unlockedPartyFeatures = new ArrayList<>();
+        List<String> lockedPartyFeatures = new ArrayList<>();
 
         for (PartyFeature partyFeature : PartyFeature.values()) {
             if (!partyFeature.hasPermission(player)) {

src/main/java/com/gmail/nossr50/commands/party/PartyInviteCommand.java

@@ -11,64 +11,60 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyInviteCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 2:
-                String targetName = CommandUtils.getMatchedPlayerName(args[1]);
-                McMMOPlayer mcMMOTarget = UserManager.getOfflinePlayer(targetName);
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 2) {
+            String targetName = CommandUtils.getMatchedPlayerName(args[1]);
+            McMMOPlayer mcMMOTarget = UserManager.getOfflinePlayer(targetName);
 
-                if (!CommandUtils.checkPlayerExistence(sender, targetName, mcMMOTarget)) {
-                    return false;
-                }
+            if (!CommandUtils.checkPlayerExistence(sender, targetName, mcMMOTarget)) {
+                return false;
+            }
 
-                Player target = mcMMOTarget.getPlayer();
+            Player target = mcMMOTarget.getPlayer();
 
-                if(UserManager.getPlayer((Player) sender) == null)
-                {
-                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
-                    return true;
-                }
-
-                Player player = (Player) sender;
-                McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
-                String playerName = player.getName();
-
-                if (player.equals(target)) {
-                    sender.sendMessage(LocaleLoader.getString("Party.Invite.Self"));
-                    return true;
-                }
-
-                if (PartyManager.inSameParty(player, target)) {
-                    sender.sendMessage(LocaleLoader.getString("Party.Player.InSameParty", targetName));
-                    return true;
-                }
-
-                if (!PartyManager.canInvite(mcMMOPlayer)) {
-                    player.sendMessage(LocaleLoader.getString("Party.Locked"));
-                    return true;
-                }
-
-                Party playerParty = mcMMOPlayer.getParty();
-
-                if(PartyManager.isPartyFull(target, playerParty))
-                {
-                    player.sendMessage(LocaleLoader.getString("Commands.Party.PartyFull.Invite", target.getName(), playerParty.toString(), Config.getInstance().getPartyMaxSize()));
-                    return true;
-                }
-
-                mcMMOTarget.setPartyInvite(playerParty);
-
-                sender.sendMessage(LocaleLoader.getString("Commands.Invite.Success"));
-                target.sendMessage(LocaleLoader.getString("Commands.Party.Invite.0", playerParty.getName(), playerName));
-                target.sendMessage(LocaleLoader.getString("Commands.Party.Invite.1"));
+            if (UserManager.getPlayer((Player) sender) == null) {
+                sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
                 return true;
+            }
 
-            default:
-                sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "invite", "<" + LocaleLoader.getString("Commands.Usage.Player") + ">"));
+            Player player = (Player) sender;
+            McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
+            String playerName = player.getName();
+
+            if (player.equals(target)) {
+                sender.sendMessage(LocaleLoader.getString("Party.Invite.Self"));
                 return true;
+            }
+
+            if (PartyManager.inSameParty(player, target)) {
+                sender.sendMessage(LocaleLoader.getString("Party.Player.InSameParty", targetName));
+                return true;
+            }
+
+            if (!PartyManager.canInvite(mcMMOPlayer)) {
+                player.sendMessage(LocaleLoader.getString("Party.Locked"));
+                return true;
+            }
+
+            Party playerParty = mcMMOPlayer.getParty();
+
+            if (PartyManager.isPartyFull(target, playerParty)) {
+                player.sendMessage(LocaleLoader.getString("Commands.Party.PartyFull.Invite", target.getName(), playerParty.toString(), Config.getInstance().getPartyMaxSize()));
+                return true;
+            }
+
+            mcMMOTarget.setPartyInvite(playerParty);
+
+            sender.sendMessage(LocaleLoader.getString("Commands.Invite.Success"));
+            target.sendMessage(LocaleLoader.getString("Commands.Party.Invite.0", playerParty.getName(), playerName));
+            target.sendMessage(LocaleLoader.getString("Commands.Party.Invite.1"));
+            return true;
         }
+        sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "invite", "<" + LocaleLoader.getString("Commands.Usage.Player") + ">"));
+        return true;
     }
 }

src/main/java/com/gmail/nossr50/commands/party/PartyItemShareCommand.java

@@ -13,12 +13,13 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Locale;
 
 public class PartyItemShareCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if(UserManager.getPlayer((Player) sender) == null)
         {
             sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));

src/main/java/com/gmail/nossr50/commands/party/PartyJoinCommand.java

@@ -10,10 +10,11 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyJoinCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         switch (args.length) {
             case 2:
             case 3:

src/main/java/com/gmail/nossr50/commands/party/PartyKickCommand.java

@@ -12,46 +12,43 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyKickCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 2:
-                if(UserManager.getPlayer((Player) sender) == null)
-                {
-                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 2) {
+            if (UserManager.getPlayer((Player) sender) == null) {
+                sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
+                return true;
+            }
+
+            Party playerParty = UserManager.getPlayer((Player) sender).getParty();
+            String targetName = CommandUtils.getMatchedPlayerName(args[1]);
+
+            if (!playerParty.hasMember(targetName)) {
+                sender.sendMessage(LocaleLoader.getString("Party.NotInYourParty", targetName));
+                return true;
+            }
+
+            OfflinePlayer target = mcMMO.p.getServer().getOfflinePlayer(targetName);
+
+            if (target.isOnline()) {
+                Player onlineTarget = target.getPlayer();
+                String partyName = playerParty.getName();
+
+                if (!PartyManager.handlePartyChangeEvent(onlineTarget, partyName, null, EventReason.KICKED_FROM_PARTY)) {
                     return true;
                 }
 
-                Party playerParty = UserManager.getPlayer((Player) sender).getParty();
-                String targetName = CommandUtils.getMatchedPlayerName(args[1]);
+                PartyManager.processPartyLeaving(UserManager.getPlayer(onlineTarget));
+                onlineTarget.sendMessage(LocaleLoader.getString("Commands.Party.Kick", partyName));
+            }
 
-                if (!playerParty.hasMember(targetName)) {
-                    sender.sendMessage(LocaleLoader.getString("Party.NotInYourParty", targetName));
-                    return true;
-                }
-
-                OfflinePlayer target = mcMMO.p.getServer().getOfflinePlayer(targetName);
-
-                if (target.isOnline()) {
-                    Player onlineTarget = target.getPlayer();
-                    String partyName = playerParty.getName();
-
-                    if (!PartyManager.handlePartyChangeEvent(onlineTarget, partyName, null, EventReason.KICKED_FROM_PARTY)) {
-                        return true;
-                    }
-
-                    PartyManager.processPartyLeaving(UserManager.getPlayer(onlineTarget));
-                    onlineTarget.sendMessage(LocaleLoader.getString("Commands.Party.Kick", partyName));
-                }
-
-                PartyManager.removeFromParty(target, playerParty);
-                return true;
-
-            default:
-                sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "kick", "<" + LocaleLoader.getString("Commands.Usage.Player") + ">"));
-                return true;
+            PartyManager.removeFromParty(target, playerParty);
+            return true;
         }
+        sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "kick", "<" + LocaleLoader.getString("Commands.Usage.Player") + ">"));
+        return true;
     }
 }

src/main/java/com/gmail/nossr50/commands/party/PartyLockCommand.java

@@ -9,10 +9,11 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyLockCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         switch (args.length) {
             case 1:
                 if (args[0].equalsIgnoreCase("lock")) {
@@ -67,7 +68,7 @@ public class PartyLockCommand implements CommandExecutor {
             return;
         }
 
-        if (lock ? party.isLocked() : !party.isLocked()) {
+        if (lock == party.isLocked()) {
             sender.sendMessage(LocaleLoader.getString("Party." + (lock ? "IsLocked" : "IsntLocked")));
             return;
         }

src/main/java/com/gmail/nossr50/commands/party/PartyQuitCommand.java

@@ -10,34 +10,31 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyQuitCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 1:
-                Player player = (Player) sender;
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 1) {
+            Player player = (Player) sender;
 
-                if(UserManager.getPlayer((Player) sender) == null)
-                {
-                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
-                    return true;
-                }
-
-                McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
-                Party playerParty = mcMMOPlayer.getParty();
-
-                if (!PartyManager.handlePartyChangeEvent(player, playerParty.getName(), null, EventReason.LEFT_PARTY)) {
-                    return true;
-                }
-
-                PartyManager.removeFromParty(mcMMOPlayer);
-                sender.sendMessage(LocaleLoader.getString("Commands.Party.Leave"));
+            if (UserManager.getPlayer((Player) sender) == null) {
+                sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
                 return true;
+            }
 
-            default:
-                sender.sendMessage(LocaleLoader.getString("Commands.Usage.1", "party", "quit"));
+            McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
+            Party playerParty = mcMMOPlayer.getParty();
+
+            if (!PartyManager.handlePartyChangeEvent(player, playerParty.getName(), null, EventReason.LEFT_PARTY)) {
                 return true;
+            }
+
+            PartyManager.removeFromParty(mcMMOPlayer);
+            sender.sendMessage(LocaleLoader.getString("Commands.Party.Leave"));
+            return true;
         }
+        sender.sendMessage(LocaleLoader.getString("Commands.Usage.1", "party", "quit"));
+        return true;
     }
 }

src/main/java/com/gmail/nossr50/commands/party/PartyRenameCommand.java

@@ -10,57 +10,54 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyRenameCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 2:
-                if(UserManager.getPlayer((Player) sender) == null)
-                {
-                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
-                    return true;
-                }
-
-                McMMOPlayer mcMMOPlayer = UserManager.getPlayer((Player) sender);
-                Party playerParty = mcMMOPlayer.getParty();
-
-                String oldPartyName = playerParty.getName();
-                String newPartyName = args[1];
-
-                // This is to prevent party leaders from spamming other players with the rename message
-                if (oldPartyName.equalsIgnoreCase(newPartyName)) {
-                    sender.sendMessage(LocaleLoader.getString("Party.Rename.Same"));
-                    return true;
-                }
-
-                Player player = mcMMOPlayer.getPlayer();
-
-                // Check to see if the party exists, and if it does cancel renaming the party
-                if (PartyManager.checkPartyExistence(player, newPartyName)) {
-                    return true;
-                }
-
-                String leaderName = playerParty.getLeader().getPlayerName();
-
-                for (Player member : playerParty.getOnlineMembers()) {
-                    if (!PartyManager.handlePartyChangeEvent(member, oldPartyName, newPartyName, EventReason.CHANGED_PARTIES)) {
-                        return true;
-                    }
-
-                    if (!member.getName().equalsIgnoreCase(leaderName)) {
-                        member.sendMessage(LocaleLoader.getString("Party.InformedOnNameChange", leaderName, newPartyName));
-                    }
-                }
-
-                playerParty.setName(newPartyName);
-
-                sender.sendMessage(LocaleLoader.getString("Commands.Party.Rename", newPartyName));
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 2) {
+            if (UserManager.getPlayer((Player) sender) == null) {
+                sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
                 return true;
+            }
 
-            default:
-                sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "rename", "<" + LocaleLoader.getString("Commands.Usage.PartyName") + ">"));
+            McMMOPlayer mcMMOPlayer = UserManager.getPlayer((Player) sender);
+            Party playerParty = mcMMOPlayer.getParty();
+
+            String oldPartyName = playerParty.getName();
+            String newPartyName = args[1];
+
+            // This is to prevent party leaders from spamming other players with the rename message
+            if (oldPartyName.equalsIgnoreCase(newPartyName)) {
+                sender.sendMessage(LocaleLoader.getString("Party.Rename.Same"));
                 return true;
+            }
+
+            Player player = mcMMOPlayer.getPlayer();
+
+            // Check to see if the party exists, and if it does cancel renaming the party
+            if (PartyManager.checkPartyExistence(player, newPartyName)) {
+                return true;
+            }
+
+            String leaderName = playerParty.getLeader().getPlayerName();
+
+            for (Player member : playerParty.getOnlineMembers()) {
+                if (!PartyManager.handlePartyChangeEvent(member, oldPartyName, newPartyName, EventReason.CHANGED_PARTIES)) {
+                    return true;
+                }
+
+                if (!member.getName().equalsIgnoreCase(leaderName)) {
+                    member.sendMessage(LocaleLoader.getString("Party.InformedOnNameChange", leaderName, newPartyName));
+                }
+            }
+
+            playerParty.setName(newPartyName);
+
+            sender.sendMessage(LocaleLoader.getString("Commands.Party.Rename", newPartyName));
+            return true;
         }
+        sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "rename", "<" + LocaleLoader.getString("Commands.Usage.PartyName") + ">"));
+        return true;
     }
 }

src/main/java/com/gmail/nossr50/commands/party/PartyXpShareCommand.java

@@ -12,10 +12,11 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyXpShareCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if(UserManager.getPlayer((Player) sender) == null)
         {
             sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
@@ -29,24 +30,19 @@ public class PartyXpShareCommand implements CommandExecutor {
             return true;
         }
 
-        switch (args.length) {
-            case 2:
-                if (args[1].equalsIgnoreCase("none") || CommandUtils.shouldDisableToggle(args[1])) {
-                    handleChangingShareMode(party, ShareMode.NONE);
-                }
-                else if (args[1].equalsIgnoreCase("equal") || args[1].equalsIgnoreCase("even") || CommandUtils.shouldEnableToggle(args[1])) {
-                    handleChangingShareMode(party, ShareMode.EQUAL);
-                }
-                else {
-                    sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "xpshare", "<NONE | EQUAL>"));
-                }
-
-                return true;
-
-            default:
+        if (args.length == 2) {
+            if (args[1].equalsIgnoreCase("none") || CommandUtils.shouldDisableToggle(args[1])) {
+                handleChangingShareMode(party, ShareMode.NONE);
+            } else if (args[1].equalsIgnoreCase("equal") || args[1].equalsIgnoreCase("even") || CommandUtils.shouldEnableToggle(args[1])) {
+                handleChangingShareMode(party, ShareMode.EQUAL);
+            } else {
                 sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "xpshare", "<NONE | EQUAL>"));
-                return true;
+            }
+
+            return true;
         }
+        sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "xpshare", "<NONE | EQUAL>"));
+        return true;
     }
 
     private void handleChangingShareMode(Party party, ShareMode mode) {

src/main/java/com/gmail/nossr50/commands/party/alliance/PartyAllianceAcceptCommand.java

@@ -8,36 +8,33 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyAllianceAcceptCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 2:
-                if(UserManager.getPlayer((Player) sender) == null)
-                {
-                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
-                    return true;
-                }
-                Player player = (Player) sender;
-                McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
-
-                if (!mcMMOPlayer.hasPartyAllianceInvite()) {
-                    sender.sendMessage(LocaleLoader.getString("mcMMO.NoInvites"));
-                    return true;
-                }
-
-                if (mcMMOPlayer.getParty().getAlly() != null) {
-                    player.sendMessage(LocaleLoader.getString("Commands.Party.Alliance.AlreadyAllies"));
-                    return true;
-                }
-
-                PartyManager.acceptAllianceInvite(mcMMOPlayer);
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 2) {
+            if (UserManager.getPlayer((Player) sender) == null) {
+                sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
                 return true;
+            }
+            Player player = (Player) sender;
+            McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
 
-            default:
-                sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "alliance", "accept"));
+            if (!mcMMOPlayer.hasPartyAllianceInvite()) {
+                sender.sendMessage(LocaleLoader.getString("mcMMO.NoInvites"));
                 return true;
+            }
+
+            if (mcMMOPlayer.getParty().getAlly() != null) {
+                player.sendMessage(LocaleLoader.getString("Commands.Party.Alliance.AlreadyAllies"));
+                return true;
+            }
+
+            PartyManager.acceptAllianceInvite(mcMMOPlayer);
+            return true;
         }
+        sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "alliance", "accept"));
+        return true;
     }
 }

src/main/java/com/gmail/nossr50/commands/party/alliance/PartyAllianceCommand.java

@@ -16,6 +16,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -27,12 +28,12 @@ public class PartyAllianceCommand implements TabExecutor {
 
     public static final List<String> ALLIANCE_SUBCOMMANDS = ImmutableList.of("invite", "accept", "disband");
 
-    private CommandExecutor partyAllianceInviteCommand = new PartyAllianceInviteCommand();
-    private CommandExecutor partyAllianceAcceptCommand = new PartyAllianceAcceptCommand();
-    private CommandExecutor partyAllianceDisbandCommand = new PartyAllianceDisbandCommand();
+    private final CommandExecutor partyAllianceInviteCommand = new PartyAllianceInviteCommand();
+    private final CommandExecutor partyAllianceAcceptCommand = new PartyAllianceAcceptCommand();
+    private final CommandExecutor partyAllianceDisbandCommand = new PartyAllianceDisbandCommand();
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (CommandUtils.noConsoleUsage(sender)) {
             return true;
         }
@@ -108,20 +109,18 @@ public class PartyAllianceCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender commandSender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 1:
-                List<String> matches = StringUtil.copyPartialMatches(args[0], ALLIANCE_SUBCOMMANDS, new ArrayList<String>(ALLIANCE_SUBCOMMANDS.size()));
+    public List<String> onTabComplete(@NotNull CommandSender commandSender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 1) {
+            List<String> matches = StringUtil.copyPartialMatches(args[0], ALLIANCE_SUBCOMMANDS, new ArrayList<>(ALLIANCE_SUBCOMMANDS.size()));
 
-                if (matches.size() == 0) {
-                    List<String> playerNames = CommandUtils.getOnlinePlayerNames(commandSender);
-                    return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<String>(playerNames.size()));
-                }
+            if (matches.size() == 0) {
+                List<String> playerNames = CommandUtils.getOnlinePlayerNames(commandSender);
+                return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<>(playerNames.size()));
+            }
 
-                return matches;
-            default:
-                return ImmutableList.of();
+            return matches;
         }
+        return ImmutableList.of();
     }
 
     private void displayPartyHeader() {

src/main/java/com/gmail/nossr50/commands/party/alliance/PartyAllianceDisbandCommand.java

@@ -9,32 +9,29 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyAllianceDisbandCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 2:
-                if(UserManager.getPlayer((Player) sender) == null)
-                {
-                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
-                    return true;
-                }
-                Player player = (Player) sender;
-                McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
-                Party party = mcMMOPlayer.getParty();
-
-                if (party.getAlly() == null) {
-                    sender.sendMessage(LocaleLoader.getString("Commands.Party.Alliance.None"));
-                    return true;
-                }
-
-                PartyManager.disbandAlliance(player, party, party.getAlly());
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 2) {
+            if (UserManager.getPlayer((Player) sender) == null) {
+                sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
                 return true;
+            }
+            Player player = (Player) sender;
+            McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
+            Party party = mcMMOPlayer.getParty();
 
-            default:
-                sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "alliance", "disband"));
+            if (party.getAlly() == null) {
+                sender.sendMessage(LocaleLoader.getString("Commands.Party.Alliance.None"));
                 return true;
+            }
+
+            PartyManager.disbandAlliance(player, party, party.getAlly());
+            return true;
         }
+        sender.sendMessage(LocaleLoader.getString("Commands.Usage.2", "party", "alliance", "disband"));
+        return true;
     }
 }

src/main/java/com/gmail/nossr50/commands/party/alliance/PartyAllianceInviteCommand.java

@@ -10,68 +10,65 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PartyAllianceInviteCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 3:
-                String targetName = CommandUtils.getMatchedPlayerName(args[2]);
-                McMMOPlayer mcMMOTarget = UserManager.getOfflinePlayer(targetName);
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 3) {
+            String targetName = CommandUtils.getMatchedPlayerName(args[2]);
+            McMMOPlayer mcMMOTarget = UserManager.getOfflinePlayer(targetName);
 
-                if (!CommandUtils.checkPlayerExistence(sender, targetName, mcMMOTarget)) {
-                    return false;
-                }
+            if (!CommandUtils.checkPlayerExistence(sender, targetName, mcMMOTarget)) {
+                return false;
+            }
 
-                Player target = mcMMOTarget.getPlayer();
+            Player target = mcMMOTarget.getPlayer();
 
-                if(UserManager.getPlayer((Player) sender) == null)
-                {
-                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
-                    return true;
-                }
-
-                Player player = (Player) sender;
-                McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
-                String playerName = player.getName();
-
-                if (player.equals(target)) {
-                    sender.sendMessage(LocaleLoader.getString("Party.Invite.Self"));
-                    return true;
-                }
-
-                if (!mcMMOTarget.inParty()) {
-                    player.sendMessage(LocaleLoader.getString("Party.PlayerNotInParty", targetName));
-                    return true;
-                }
-
-                if (PartyManager.inSameParty(player, target)) {
-                    sender.sendMessage(LocaleLoader.getString("Party.Player.InSameParty", targetName));
-                    return true;
-                }
-
-                if (!mcMMOTarget.getParty().getLeader().getUniqueId().equals(target.getUniqueId())) {
-                    player.sendMessage(LocaleLoader.getString("Party.Target.NotOwner", targetName));
-                    return true;
-                }
-
-                Party playerParty = mcMMOPlayer.getParty();
-
-                if (playerParty.getAlly() != null) {
-                    player.sendMessage(LocaleLoader.getString("Commands.Party.Alliance.AlreadyAllies"));
-                    return true;
-                }
-
-                mcMMOTarget.setPartyAllianceInvite(playerParty);
-
-                sender.sendMessage(LocaleLoader.getString("Commands.Invite.Success"));
-                target.sendMessage(LocaleLoader.getString("Commands.Party.Alliance.Invite.0", playerParty.getName(), playerName));
-                target.sendMessage(LocaleLoader.getString("Commands.Party.Alliance.Invite.1"));
+            if (UserManager.getPlayer((Player) sender) == null) {
+                sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
                 return true;
+            }
 
-            default:
-                sender.sendMessage(LocaleLoader.getString("Commands.Usage.3", "party", "alliance", "invite", "<" + LocaleLoader.getString("Commands.Usage.Player") + ">"));
+            Player player = (Player) sender;
+            McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
+            String playerName = player.getName();
+
+            if (player.equals(target)) {
+                sender.sendMessage(LocaleLoader.getString("Party.Invite.Self"));
                 return true;
+            }
+
+            if (!mcMMOTarget.inParty()) {
+                player.sendMessage(LocaleLoader.getString("Party.PlayerNotInParty", targetName));
+                return true;
+            }
+
+            if (PartyManager.inSameParty(player, target)) {
+                sender.sendMessage(LocaleLoader.getString("Party.Player.InSameParty", targetName));
+                return true;
+            }
+
+            if (!mcMMOTarget.getParty().getLeader().getUniqueId().equals(target.getUniqueId())) {
+                player.sendMessage(LocaleLoader.getString("Party.Target.NotOwner", targetName));
+                return true;
+            }
+
+            Party playerParty = mcMMOPlayer.getParty();
+
+            if (playerParty.getAlly() != null) {
+                player.sendMessage(LocaleLoader.getString("Commands.Party.Alliance.AlreadyAllies"));
+                return true;
+            }
+
+            mcMMOTarget.setPartyAllianceInvite(playerParty);
+
+            sender.sendMessage(LocaleLoader.getString("Commands.Invite.Success"));
+            target.sendMessage(LocaleLoader.getString("Commands.Party.Alliance.Invite.0", playerParty.getName(), playerName));
+            target.sendMessage(LocaleLoader.getString("Commands.Party.Alliance.Invite.1"));
+            return true;
         }
+        sender.sendMessage(LocaleLoader.getString("Commands.Usage.3", "party", "alliance", "invite", "<" + LocaleLoader.getString("Commands.Usage.Player") + ">"));
+        return true;
     }
 }

src/main/java/com/gmail/nossr50/commands/party/teleport/PtpAcceptAnyCommand.java

@@ -7,10 +7,11 @@ import com.gmail.nossr50.util.player.UserManager;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
 
 public class PtpAcceptAnyCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (!Permissions.partyTeleportAcceptAll(sender)) {
             sender.sendMessage(command.getPermissionMessage());
             return true;

src/main/java/com/gmail/nossr50/commands/party/teleport/PtpAcceptCommand.java

@@ -11,10 +11,11 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 public class PtpAcceptCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (!Permissions.partyTeleportAccept(sender)) {
             sender.sendMessage(command.getPermissionMessage());
             return true;

src/main/java/com/gmail/nossr50/commands/party/teleport/PtpCommand.java

@@ -26,6 +26,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -33,12 +34,12 @@ import java.util.List;
 public class PtpCommand implements TabExecutor {
     public static final List<String> TELEPORT_SUBCOMMANDS = ImmutableList.of("toggle", "accept", "acceptany", "acceptall");
 
-    private CommandExecutor ptpToggleCommand = new PtpToggleCommand();
-    private CommandExecutor ptpAcceptAnyCommand = new PtpAcceptAnyCommand();
-    private CommandExecutor ptpAcceptCommand = new PtpAcceptCommand();
+    private final CommandExecutor ptpToggleCommand = new PtpToggleCommand();
+    private final CommandExecutor ptpAcceptAnyCommand = new PtpAcceptAnyCommand();
+    private final CommandExecutor ptpAcceptCommand = new PtpAcceptCommand();
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (CommandUtils.noConsoleUsage(sender)) {
             return true;
         }
@@ -80,85 +81,79 @@ public class PtpCommand implements TabExecutor {
             return true;
         }
 
-        switch (args.length) {
-            case 1:
-                if (args[0].equalsIgnoreCase("toggle")) {
-                    return ptpToggleCommand.onCommand(sender, command, label, args);
-                }
+        if (args.length == 1) {
+            if (args[0].equalsIgnoreCase("toggle")) {
+                return ptpToggleCommand.onCommand(sender, command, label, args);
+            }
 
-                if (args[0].equalsIgnoreCase("acceptany") || args[0].equalsIgnoreCase("acceptall")) {
-                    return ptpAcceptAnyCommand.onCommand(sender, command, label, args);
-                }
+            if (args[0].equalsIgnoreCase("acceptany") || args[0].equalsIgnoreCase("acceptall")) {
+                return ptpAcceptAnyCommand.onCommand(sender, command, label, args);
+            }
 
-                long recentlyHurt = mcMMOPlayer.getRecentlyHurt();
-                int hurtCooldown = Config.getInstance().getPTPCommandRecentlyHurtCooldown();
+            long recentlyHurt = mcMMOPlayer.getRecentlyHurt();
+            int hurtCooldown = Config.getInstance().getPTPCommandRecentlyHurtCooldown();
 
-                if (hurtCooldown > 0) {
-                    int timeRemaining = SkillUtils.calculateTimeLeft(recentlyHurt * Misc.TIME_CONVERSION_FACTOR, hurtCooldown, player);
+            if (hurtCooldown > 0) {
+                int timeRemaining = SkillUtils.calculateTimeLeft(recentlyHurt * Misc.TIME_CONVERSION_FACTOR, hurtCooldown, player);
 
-                    if (timeRemaining > 0) {
-                        player.sendMessage(LocaleLoader.getString("Item.Injured.Wait", timeRemaining));
-                        return true;
-                    }
-                }
-
-                if (args[0].equalsIgnoreCase("accept")) {
-                    return ptpAcceptCommand.onCommand(sender, command, label, args);
-                }
-
-                if (!Permissions.partyTeleportSend(sender)) {
-                    sender.sendMessage(command.getPermissionMessage());
+                if (timeRemaining > 0) {
+                    player.sendMessage(LocaleLoader.getString("Item.Injured.Wait", timeRemaining));
                     return true;
                 }
+            }
 
-                int ptpCooldown = Config.getInstance().getPTPCommandCooldown();
-                long ptpLastUse = mcMMOPlayer.getPartyTeleportRecord().getLastUse();
+            if (args[0].equalsIgnoreCase("accept")) {
+                return ptpAcceptCommand.onCommand(sender, command, label, args);
+            }
 
-                if (ptpCooldown > 0) {
-                    int timeRemaining = SkillUtils.calculateTimeLeft(ptpLastUse * Misc.TIME_CONVERSION_FACTOR, ptpCooldown, player);
-
-                    if (timeRemaining > 0) {
-                        player.sendMessage(LocaleLoader.getString("Item.Generic.Wait", timeRemaining));
-                        return true;
-                    }
-                }
-
-                sendTeleportRequest(sender, player, CommandUtils.getMatchedPlayerName(args[0]));
+            if (!Permissions.partyTeleportSend(sender)) {
+                sender.sendMessage(command.getPermissionMessage());
                 return true;
+            }
 
-            default:
-                return false;
+            int ptpCooldown = Config.getInstance().getPTPCommandCooldown();
+            long ptpLastUse = mcMMOPlayer.getPartyTeleportRecord().getLastUse();
+
+            if (ptpCooldown > 0) {
+                int timeRemaining = SkillUtils.calculateTimeLeft(ptpLastUse * Misc.TIME_CONVERSION_FACTOR, ptpCooldown, player);
+
+                if (timeRemaining > 0) {
+                    player.sendMessage(LocaleLoader.getString("Item.Generic.Wait", timeRemaining));
+                    return true;
+                }
+            }
+
+            sendTeleportRequest(sender, player, CommandUtils.getMatchedPlayerName(args[0]));
+            return true;
         }
+        return false;
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
-        switch (args.length) {
-            case 1:
-                List<String> matches = StringUtil.copyPartialMatches(args[0], TELEPORT_SUBCOMMANDS, new ArrayList<String>(TELEPORT_SUBCOMMANDS.size()));
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        if (args.length == 1) {
+            List<String> matches = StringUtil.copyPartialMatches(args[0], TELEPORT_SUBCOMMANDS, new ArrayList<>(TELEPORT_SUBCOMMANDS.size()));
 
-                if (matches.size() == 0) {
-                    if(UserManager.getPlayer((Player) sender) == null)
-                    {
-                        sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
-                        return ImmutableList.of();
-                    }
-
-                    Player player = (Player) sender;
-                    McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
-
-                    if (!mcMMOPlayer.inParty()) {
-                        return ImmutableList.of();
-                    }
-
-                    List<String> playerNames = mcMMOPlayer.getParty().getOnlinePlayerNames(player);
-                    return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<String>(playerNames.size()));
+            if (matches.size() == 0) {
+                if (UserManager.getPlayer((Player) sender) == null) {
+                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
+                    return ImmutableList.of();
                 }
 
-                return matches;
-            default:
-                return ImmutableList.of();
+                Player player = (Player) sender;
+                McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
+
+                if (!mcMMOPlayer.inParty()) {
+                    return ImmutableList.of();
+                }
+
+                List<String> playerNames = mcMMOPlayer.getParty().getOnlinePlayerNames(player);
+                return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<>(playerNames.size()));
+            }
+
+            return matches;
         }
+        return ImmutableList.of();
     }
 
     private void sendTeleportRequest(CommandSender sender, Player player, String targetName) {

src/main/java/com/gmail/nossr50/commands/party/teleport/PtpToggleCommand.java

@@ -7,10 +7,11 @@ import com.gmail.nossr50.util.player.UserManager;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
 
 public class PtpToggleCommand implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (!Permissions.partyTeleportToggle(sender)) {
             sender.sendMessage(command.getPermissionMessage());
             return true;

src/main/java/com/gmail/nossr50/commands/player/InspectCommand.java

@@ -16,93 +16,87 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
 
 public class InspectCommand implements TabExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
-        switch (args.length) {
-            case 1:
-                String playerName = CommandUtils.getMatchedPlayerName(args[0]);
-                McMMOPlayer mcMMOPlayer = UserManager.getOfflinePlayer(playerName);
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+        if (args.length == 1) {
+            String playerName = CommandUtils.getMatchedPlayerName(args[0]);
+            McMMOPlayer mcMMOPlayer = UserManager.getOfflinePlayer(playerName);
 
-                // If the mcMMOPlayer doesn't exist, create a temporary profile and check if it's present in the database. If it's not, abort the process.
-                if (mcMMOPlayer == null) {
-                    PlayerProfile profile = mcMMO.getDatabaseManager().loadPlayerProfile(playerName, false); // Temporary Profile
+            // If the mcMMOPlayer doesn't exist, create a temporary profile and check if it's present in the database. If it's not, abort the process.
+            if (mcMMOPlayer == null) {
+                PlayerProfile profile = mcMMO.getDatabaseManager().loadPlayerProfile(playerName, false); // Temporary Profile
 
-                    if (!CommandUtils.isLoaded(sender, profile)) {
-                        return true;
-                    }
-
-                    if (Config.getInstance().getScoreboardsEnabled() && sender instanceof Player && Config.getInstance().getInspectUseBoard()) {
-                        ScoreboardManager.enablePlayerInspectScoreboard((Player) sender, profile);
-
-                        if (!Config.getInstance().getInspectUseChat()) {
-                            return true;
-                        }
-                    }
-
-                    sender.sendMessage(LocaleLoader.getString("Inspect.OfflineStats", playerName));
-
-                    sender.sendMessage(LocaleLoader.getString("Stats.Header.Gathering"));
-                    for (PrimarySkillType skill : PrimarySkillType.GATHERING_SKILLS) {
-                        sender.sendMessage(CommandUtils.displaySkill(profile, skill));
-                    }
-
-                    sender.sendMessage(LocaleLoader.getString("Stats.Header.Combat"));
-                    for (PrimarySkillType skill : PrimarySkillType.COMBAT_SKILLS) {
-                        sender.sendMessage(CommandUtils.displaySkill(profile, skill));
-                    }
-
-                    sender.sendMessage(LocaleLoader.getString("Stats.Header.Misc"));
-                    for (PrimarySkillType skill : PrimarySkillType.MISC_SKILLS) {
-                        sender.sendMessage(CommandUtils.displaySkill(profile, skill));
-                    }
-
-                }
-                else {
-                    Player target = mcMMOPlayer.getPlayer();
-
-                    if (CommandUtils.hidden(sender, target, Permissions.inspectHidden(sender))) {
-                        sender.sendMessage(LocaleLoader.getString("Inspect.Offline"));
-                        return true;
-                    }
-                    else if (CommandUtils.tooFar(sender, target, Permissions.inspectFar(sender))) {
-                        return true;
-                    }
-
-                    if (Config.getInstance().getScoreboardsEnabled() && sender instanceof Player && Config.getInstance().getInspectUseBoard()) {
-                        ScoreboardManager.enablePlayerInspectScoreboard((Player) sender, mcMMOPlayer.getProfile());
-
-                        if (!Config.getInstance().getInspectUseChat()) {
-                            return true;
-                        }
-                    }
-
-                    sender.sendMessage(LocaleLoader.getString("Inspect.Stats", target.getName()));
-                    CommandUtils.printGatheringSkills(target, sender);
-                    CommandUtils.printCombatSkills(target, sender);
-                    CommandUtils.printMiscSkills(target, sender);
-                    sender.sendMessage(LocaleLoader.getString("Commands.PowerLevel", mcMMOPlayer.getPowerLevel()));
+                if (!CommandUtils.isLoaded(sender, profile)) {
+                    return true;
                 }
 
-                return true;
+                if (Config.getInstance().getScoreboardsEnabled() && sender instanceof Player && Config.getInstance().getInspectUseBoard()) {
+                    ScoreboardManager.enablePlayerInspectScoreboard((Player) sender, profile);
 
-            default:
-                return false;
+                    if (!Config.getInstance().getInspectUseChat()) {
+                        return true;
+                    }
+                }
+
+                sender.sendMessage(LocaleLoader.getString("Inspect.OfflineStats", playerName));
+
+                sender.sendMessage(LocaleLoader.getString("Stats.Header.Gathering"));
+                for (PrimarySkillType skill : PrimarySkillType.GATHERING_SKILLS) {
+                    sender.sendMessage(CommandUtils.displaySkill(profile, skill));
+                }
+
+                sender.sendMessage(LocaleLoader.getString("Stats.Header.Combat"));
+                for (PrimarySkillType skill : PrimarySkillType.COMBAT_SKILLS) {
+                    sender.sendMessage(CommandUtils.displaySkill(profile, skill));
+                }
+
+                sender.sendMessage(LocaleLoader.getString("Stats.Header.Misc"));
+                for (PrimarySkillType skill : PrimarySkillType.MISC_SKILLS) {
+                    sender.sendMessage(CommandUtils.displaySkill(profile, skill));
+                }
+
+            } else {
+                Player target = mcMMOPlayer.getPlayer();
+
+                if (CommandUtils.hidden(sender, target, Permissions.inspectHidden(sender))) {
+                    sender.sendMessage(LocaleLoader.getString("Inspect.Offline"));
+                    return true;
+                } else if (CommandUtils.tooFar(sender, target, Permissions.inspectFar(sender))) {
+                    return true;
+                }
+
+                if (Config.getInstance().getScoreboardsEnabled() && sender instanceof Player && Config.getInstance().getInspectUseBoard()) {
+                    ScoreboardManager.enablePlayerInspectScoreboard((Player) sender, mcMMOPlayer.getProfile());
+
+                    if (!Config.getInstance().getInspectUseChat()) {
+                        return true;
+                    }
+                }
+
+                sender.sendMessage(LocaleLoader.getString("Inspect.Stats", target.getName()));
+                CommandUtils.printGatheringSkills(target, sender);
+                CommandUtils.printCombatSkills(target, sender);
+                CommandUtils.printMiscSkills(target, sender);
+                sender.sendMessage(LocaleLoader.getString("Commands.PowerLevel", mcMMOPlayer.getPowerLevel()));
+            }
+
+            return true;
         }
+        return false;
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
-        switch (args.length) {
-            case 1:
-                List<String> playerNames = CommandUtils.getOnlinePlayerNames(sender);
-                return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<String>(playerNames.size()));
-            default:
-                return ImmutableList.of();
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        if (args.length == 1) {
+            List<String> playerNames = CommandUtils.getOnlinePlayerNames(sender);
+            return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<>(playerNames.size()));
         }
+        return ImmutableList.of();
     }
 }

src/main/java/com/gmail/nossr50/commands/player/MccooldownCommand.java

@@ -12,12 +12,13 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 public class MccooldownCommand implements TabExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (CommandUtils.noConsoleUsage(sender)) {
             return true;
         }
@@ -26,53 +27,48 @@ public class MccooldownCommand implements TabExecutor {
             return true;
         }
 
-        switch (args.length) {
-            case 0:
-                Player player = (Player) sender;
+        if (args.length == 0) {
+            Player player = (Player) sender;
 
-                if (Config.getInstance().getScoreboardsEnabled() && Config.getInstance().getCooldownUseBoard()) {
-                    ScoreboardManager.enablePlayerCooldownScoreboard(player);
+            if (Config.getInstance().getScoreboardsEnabled() && Config.getInstance().getCooldownUseBoard()) {
+                ScoreboardManager.enablePlayerCooldownScoreboard(player);
 
-                    if (!Config.getInstance().getCooldownUseChat()) {
-                        return true;
-                    }
-                }
-
-                if(UserManager.getPlayer(player) == null)
-                {
-                    player.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
+                if (!Config.getInstance().getCooldownUseChat()) {
                     return true;
                 }
+            }
 
-                McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
+            if (UserManager.getPlayer(player) == null) {
+                player.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
+                return true;
+            }
 
-                player.sendMessage(LocaleLoader.getString("Commands.Cooldowns.Header"));
-                player.sendMessage(LocaleLoader.getString("mcMMO.NoSkillNote"));
+            McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
 
-                for (SuperAbilityType ability : SuperAbilityType.values()) {
-                    if (!ability.getPermissions(player)) {
-                        continue;
-                    }
+            player.sendMessage(LocaleLoader.getString("Commands.Cooldowns.Header"));
+            player.sendMessage(LocaleLoader.getString("mcMMO.NoSkillNote"));
 
-                    int seconds = mcMMOPlayer.calculateTimeRemaining(ability);
-
-                    if (seconds <= 0) {
-                        player.sendMessage(LocaleLoader.getString("Commands.Cooldowns.Row.Y", ability.getName()));
-                    }
-                    else {
-                        player.sendMessage(LocaleLoader.getString("Commands.Cooldowns.Row.N", ability.getName(), seconds));
-                    }
+            for (SuperAbilityType ability : SuperAbilityType.values()) {
+                if (!ability.getPermissions(player)) {
+                    continue;
                 }
 
-                return true;
+                int seconds = mcMMOPlayer.calculateTimeRemaining(ability);
 
-            default:
-                return false;
+                if (seconds <= 0) {
+                    player.sendMessage(LocaleLoader.getString("Commands.Cooldowns.Row.Y", ability.getLocalizedName()));
+                } else {
+                    player.sendMessage(LocaleLoader.getString("Commands.Cooldowns.Row.N", ability.getLocalizedName(), seconds));
+                }
+            }
+
+            return true;
         }
+        return false;
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         return ImmutableList.of();
     }
 }

src/main/java/com/gmail/nossr50/commands/player/McrankCommand.java

@@ -15,13 +15,14 @@ import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.metadata.FixedMetadataValue;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
 
 public class McrankCommand implements TabExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         switch (args.length) {
             case 0:
                 if (CommandUtils.noConsoleUsage(sender)) {
@@ -72,14 +73,12 @@ public class McrankCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
-        switch (args.length) {
-            case 1:
-                List<String> playerNames = CommandUtils.getOnlinePlayerNames(sender);
-                return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<String>(playerNames.size()));
-            default:
-                return ImmutableList.of();
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        if (args.length == 1) {
+            List<String> playerNames = CommandUtils.getOnlinePlayerNames(sender);
+            return StringUtil.copyPartialMatches(args[0], playerNames, new ArrayList<>(playerNames.size()));
         }
+        return ImmutableList.of();
     }
 
     private void display(CommandSender sender, String playerName) {

src/main/java/com/gmail/nossr50/commands/player/McstatsCommand.java

@@ -10,12 +10,13 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 public class McstatsCommand implements TabExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (CommandUtils.noConsoleUsage(sender)) {
             return true;
         }
@@ -24,49 +25,44 @@ public class McstatsCommand implements TabExecutor {
             return true;
         }
 
-        switch (args.length) {
-            case 0:
-                if(UserManager.getPlayer((Player) sender) == null)
-                {
-                    sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
+        if (args.length == 0) {
+            if (UserManager.getPlayer((Player) sender) == null) {
+                sender.sendMessage(LocaleLoader.getString("Profile.PendingLoad"));
+                return true;
+            }
+
+            Player player = (Player) sender;
+
+            if (Config.getInstance().getStatsUseBoard() && Config.getInstance().getScoreboardsEnabled()) {
+                ScoreboardManager.enablePlayerStatsScoreboard(player);
+
+                if (!Config.getInstance().getStatsUseChat()) {
                     return true;
                 }
+            }
 
-                Player player = (Player) sender;
+            player.sendMessage(LocaleLoader.getString("Stats.Own.Stats"));
+            player.sendMessage(LocaleLoader.getString("mcMMO.NoSkillNote"));
 
-                if (Config.getInstance().getStatsUseBoard() && Config.getInstance().getScoreboardsEnabled()) {
-                    ScoreboardManager.enablePlayerStatsScoreboard(player);
+            CommandUtils.printGatheringSkills(player);
+            CommandUtils.printCombatSkills(player);
+            CommandUtils.printMiscSkills(player);
 
-                    if (!Config.getInstance().getStatsUseChat()) {
-                        return true;
-                    }
-                }
+            int powerLevelCap = Config.getInstance().getPowerLevelCap();
 
-                player.sendMessage(LocaleLoader.getString("Stats.Own.Stats"));
-                player.sendMessage(LocaleLoader.getString("mcMMO.NoSkillNote"));
+            if (powerLevelCap != Integer.MAX_VALUE) {
+                player.sendMessage(LocaleLoader.getString("Commands.PowerLevel.Capped", UserManager.getPlayer(player).getPowerLevel(), powerLevelCap));
+            } else {
+                player.sendMessage(LocaleLoader.getString("Commands.PowerLevel", UserManager.getPlayer(player).getPowerLevel()));
+            }
 
-                CommandUtils.printGatheringSkills(player);
-                CommandUtils.printCombatSkills(player);
-                CommandUtils.printMiscSkills(player);
-
-                int powerLevelCap = Config.getInstance().getPowerLevelCap();
-
-                if (powerLevelCap != Integer.MAX_VALUE) {
-                    player.sendMessage(LocaleLoader.getString("Commands.PowerLevel.Capped", UserManager.getPlayer(player).getPowerLevel(), powerLevelCap));
-                }
-                else {
-                    player.sendMessage(LocaleLoader.getString("Commands.PowerLevel", UserManager.getPlayer(player).getPowerLevel()));
-                }
-
-                return true;
-
-            default:
-                return false;
+            return true;
         }
+        return false;
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         return ImmutableList.of();
     }
 }

src/main/java/com/gmail/nossr50/commands/player/MctopCommand.java

@@ -17,13 +17,14 @@ import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.metadata.FixedMetadataValue;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
 
 public class MctopCommand implements TabExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         PrimarySkillType skill = null;
 
         switch (args.length) {
@@ -66,13 +67,11 @@ public class MctopCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
-        switch (args.length) {
-            case 1:
-                return StringUtil.copyPartialMatches(args[0], PrimarySkillType.SKILL_NAMES, new ArrayList<String>(PrimarySkillType.SKILL_NAMES.size()));
-            default:
-                return ImmutableList.of();
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        if (args.length == 1) {
+            return StringUtil.copyPartialMatches(args[0], PrimarySkillType.SKILL_NAMES, new ArrayList<>(PrimarySkillType.SKILL_NAMES.size()));
         }
+        return ImmutableList.of();
     }
 
     private void display(int page, PrimarySkillType skill, CommandSender sender, Command command) {
@@ -90,7 +89,7 @@ public class MctopCommand implements TabExecutor {
             long cooldownMillis = Math.max(Config.getInstance().getDatabasePlayerCooldown(), 1750);
 
             if (mcMMOPlayer.getDatabaseATS() + cooldownMillis > System.currentTimeMillis()) {
-                double seconds = ((mcMMOPlayer.getDatabaseATS() + cooldownMillis) - System.currentTimeMillis()) / 1000;
+                double seconds = ((mcMMOPlayer.getDatabaseATS() + cooldownMillis) - System.currentTimeMillis()) / 1000.0D;
                 if (seconds < 1) {
                     seconds = 1;
                 }

src/main/java/com/gmail/nossr50/commands/player/XPBarCommand.java

@@ -103,7 +103,7 @@ public class XPBarCommand implements TabExecutor {
                 return StringUtil.copyPartialMatches(args[0], options, new ArrayList<>(ExperienceBarManager.XPBarSettingTarget.values().length));
             case 2:
                 if(!args[0].equalsIgnoreCase(ExperienceBarManager.XPBarSettingTarget.RESET.toString()))
-                    return StringUtil.copyPartialMatches(args[1], PrimarySkillType.SKILL_NAMES, new ArrayList<String>(PrimarySkillType.SKILL_NAMES.size()));
+                    return StringUtil.copyPartialMatches(args[1], PrimarySkillType.SKILL_NAMES, new ArrayList<>(PrimarySkillType.SKILL_NAMES.size()));
             default:
                 return ImmutableList.of();
         }

src/main/java/com/gmail/nossr50/commands/server/Mcmmoupgrade.java

@@ -3,13 +3,14 @@ package com.gmail.nossr50.commands.server;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * This command facilitates switching the skill system scale between classic and modern scale
  */
 public class Mcmmoupgrade implements CommandExecutor {
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         return false;
     }
 }

src/main/java/com/gmail/nossr50/commands/skills/AcrobaticsCommand.java

@@ -44,7 +44,7 @@ public class AcrobaticsCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         if (canDodge) {
             messages.add(getStatMessage(SubSkillType.ACROBATICS_DODGE, dodgeChance)
@@ -71,7 +71,7 @@ public class AcrobaticsCommand extends SkillCommand {
                 graceChance      = RandomChanceUtil.getRandomChanceExecutionChance(grace_rcs);
                 //damageThreshold  = AdvancedConfig.getInstance().getRollDamageThreshold();
 
-                String rollStrings[] = getAbilityDisplayValues(SkillActivationType.RANDOM_LINEAR_100_SCALE_WITH_CAP, player, SubSkillType.ACROBATICS_ROLL);
+                String[] rollStrings = getAbilityDisplayValues(SkillActivationType.RANDOM_LINEAR_100_SCALE_WITH_CAP, player, SubSkillType.ACROBATICS_ROLL);
 
                 //Format
                 double rollChanceLucky  = rollChance * 1.333D;

src/main/java/com/gmail/nossr50/commands/skills/AlchemyCommand.java

@@ -74,7 +74,7 @@ public class AlchemyCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         if (canCatalysis) {
             messages.add(getStatMessage(SubSkillType.ALCHEMY_CATALYSIS, brewSpeed)

src/main/java/com/gmail/nossr50/commands/skills/AprilCommand.java

@@ -10,6 +10,7 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.text.DecimalFormat;
 import java.util.ArrayList;
@@ -22,51 +23,48 @@ public class AprilCommand implements TabExecutor {
     protected DecimalFormat decimal = new DecimalFormat("##0.00");
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (CommandUtils.noConsoleUsage(sender)) {
             return true;
         }
 
         skillName = StringUtils.getCapitalized(label);
 
-        switch (args.length) {
-            case 0:
-                Player player = (Player) sender;
-                FakeSkillType fakeSkillType = FakeSkillType.getByName(skillName);
+        if (args.length == 0) {
+            Player player = (Player) sender;
+            FakeSkillType fakeSkillType = FakeSkillType.getByName(skillName);
 
-                float skillValue = Misc.getRandom().nextInt(99);
+            float skillValue = Misc.getRandom().nextInt(99);
 
-                player.sendMessage(LocaleLoader.getString("Skills.Header", skillName));
-                player.sendMessage(LocaleLoader.getString("Commands.XPGain", getXPGainString(fakeSkillType)));
-                player.sendMessage(LocaleLoader.getString("Effects.Level", (int) skillValue, Misc.getRandom().nextInt(1000), 1000 + Misc.getRandom().nextInt(1000)));
+            player.sendMessage(LocaleLoader.getString("Skills.Header", skillName));
+            player.sendMessage(LocaleLoader.getString("Commands.XPGain", getXPGainString(fakeSkillType)));
+            player.sendMessage(LocaleLoader.getString("Effects.Level", (int) skillValue, Misc.getRandom().nextInt(1000), 1000 + Misc.getRandom().nextInt(1000)));
 
 
-                List<String> effectMessages = effectsDisplay(fakeSkillType);
+            List<String> effectMessages = effectsDisplay(fakeSkillType);
 
-                if (!effectMessages.isEmpty()) {
-                    player.sendMessage(LocaleLoader.getString("Skills.Header", LocaleLoader.getString("Effects.Effects")));
+            if (!effectMessages.isEmpty()) {
+                player.sendMessage(LocaleLoader.getString("Skills.Header", LocaleLoader.getString("Effects.Effects")));
 
-                    for (String message : effectMessages) {
-                        player.sendMessage(message);
-                    }
+                for (String message : effectMessages) {
+                    player.sendMessage(message);
                 }
+            }
 
-                List<String> statsMessages = statsDisplay(fakeSkillType);
+            List<String> statsMessages = statsDisplay(fakeSkillType);
 
-                if (!statsMessages.isEmpty()) {
-                    player.sendMessage(LocaleLoader.getString("Skills.Header", LocaleLoader.getString("Commands.Stats.Self")));
+            if (!statsMessages.isEmpty()) {
+                player.sendMessage(LocaleLoader.getString("Skills.Header", LocaleLoader.getString("Commands.Stats.Self")));
 
-                    for (String message : statsMessages) {
-                        player.sendMessage(message);
-                    }
+                for (String message : statsMessages) {
+                    player.sendMessage(message);
                 }
+            }
 
-                player.sendMessage(LocaleLoader.formatString("[[DARK_AQUA]]Guide for {0} available - type /APRIL FOOLS ! :D", skillName));
-                return true;
-
-            default:
-                return true;
+            player.sendMessage(LocaleLoader.formatString("[[DARK_AQUA]]Guide for {0} available - type /APRIL FOOLS ! :D", skillName));
+            return true;
         }
+        return true;
     }
 
     private String getXPGainString(FakeSkillType fakeSkillType) {
@@ -101,17 +99,15 @@ public class AprilCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
-        switch (args.length) {
-            case 1:
-                return ImmutableList.of("?");
-            default:
-                return ImmutableList.of();
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        if (args.length == 1) {
+            return ImmutableList.of("?");
         }
+        return ImmutableList.of();
     }
 
     private List<String> effectsDisplay(FakeSkillType fakeSkillType) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         switch (fakeSkillType) {
             case MACHO:
@@ -157,7 +153,7 @@ public class AprilCommand implements TabExecutor {
     }
 
     private List<String> statsDisplay(FakeSkillType fakeSkillType) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         switch (fakeSkillType) {
             case MACHO:

src/main/java/com/gmail/nossr50/commands/skills/ArcheryCommand.java

@@ -59,7 +59,7 @@ public class ArcheryCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         if (canRetrieve) {
             messages.add(getStatMessage(SubSkillType.ARCHERY_ARROW_RETRIEVAL, retrieveChance)

src/main/java/com/gmail/nossr50/commands/skills/AxesCommand.java

@@ -72,7 +72,7 @@ public class AxesCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         if (canImpact) {
             messages.add(LocaleLoader.getString("Ability.Generic.Template", LocaleLoader.getString("Axes.Ability.Bonus.2"), LocaleLoader.getString("Axes.Ability.Bonus.3", impactDamage)));

src/main/java/com/gmail/nossr50/commands/skills/ExcavationCommand.java

@@ -29,7 +29,7 @@ public class ExcavationCommand extends SkillCommand {
     protected void dataCalculations(Player player, float skillValue) {
         // GIGA DRILL BREAKER
         if (canGigaDrill) {
-            String gigaDrillStrings[] = calculateLengthDisplayValues(player, skillValue);
+            String[] gigaDrillStrings = calculateLengthDisplayValues(player, skillValue);
             gigaDrillBreakerLength = gigaDrillStrings[0];
             gigaDrillBreakerLengthEndurance = gigaDrillStrings[1];
         }
@@ -43,7 +43,7 @@ public class ExcavationCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         ExcavationManager excavationManager = UserManager.getPlayer(player).getExcavationManager();
 

src/main/java/com/gmail/nossr50/commands/skills/FishingCommand.java

@@ -128,7 +128,7 @@ public class FishingCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
         
         if (canFishermansDiet) {
             messages.add(getStatMessage(false, true, SubSkillType.FISHING_FISHERMANS_DIET, String.valueOf(fishermansDietRank)));

src/main/java/com/gmail/nossr50/commands/skills/HerbalismCommand.java

@@ -45,7 +45,7 @@ public class HerbalismCommand extends SkillCommand {
         
         // DOUBLE DROPS
         if (canDoubleDrop) {
-            String[] doubleDropStrings = getAbilityDisplayValues(SkillActivationType.RANDOM_LINEAR_100_SCALE_WITH_CAP, player, SubSkillType.HERBALISM_DOUBLE_DROPS);;
+            String[] doubleDropStrings = getAbilityDisplayValues(SkillActivationType.RANDOM_LINEAR_100_SCALE_WITH_CAP, player, SubSkillType.HERBALISM_DOUBLE_DROPS);
             doubleDropChance = doubleDropStrings[0];
             doubleDropChanceLucky = doubleDropStrings[1];
         }
@@ -99,7 +99,7 @@ public class HerbalismCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         if (canDoubleDrop) {
             messages.add(getStatMessage(SubSkillType.HERBALISM_DOUBLE_DROPS, doubleDropChance)

src/main/java/com/gmail/nossr50/commands/skills/MiningCommand.java

@@ -78,7 +78,7 @@ public class MiningCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         if (canBiggerBombs) {
             messages.add(getStatMessage(true, true, SubSkillType.MINING_BLAST_MINING, String.valueOf(blastRadiusIncrease)));

src/main/java/com/gmail/nossr50/commands/skills/MmoInfoCommand.java

@@ -13,6 +13,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.util.StringUtil;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -23,7 +24,7 @@ import java.util.List;
 public class MmoInfoCommand implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender commandSender, Command command, String s, String[] args) {
+    public boolean onCommand(@NotNull CommandSender commandSender, @NotNull Command command, @NotNull String s, String[] args) {
         /*
          * Only allow players to use this command
          */
@@ -61,13 +62,11 @@ public class MmoInfoCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
-        switch (args.length) {
-            case 1:
-                return StringUtil.copyPartialMatches(args[0], PrimarySkillType.SUBSKILL_NAMES, new ArrayList<String>(PrimarySkillType.SUBSKILL_NAMES.size()));
-            default:
-                return ImmutableList.of();
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        if (args.length == 1) {
+            return StringUtil.copyPartialMatches(args[0], PrimarySkillType.SUBSKILL_NAMES, new ArrayList<>(PrimarySkillType.SUBSKILL_NAMES.size()));
         }
+        return ImmutableList.of();
     }
 
     private void displayInfo(Player player, String subSkillName)

src/main/java/com/gmail/nossr50/commands/skills/RepairCommand.java

@@ -91,7 +91,7 @@ public class RepairCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         if (canArcaneForge) {
             RepairManager repairManager = UserManager.getPlayer(player).getRepairManager();

src/main/java/com/gmail/nossr50/commands/skills/SalvageCommand.java

@@ -36,7 +36,7 @@ public class SalvageCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
         SalvageManager salvageManager = UserManager.getPlayer(player).getSalvageManager();
 
         if (canScrapCollector) {

src/main/java/com/gmail/nossr50/commands/skills/SkillCommand.java

@@ -26,6 +26,7 @@ import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.text.DecimalFormat;
 import java.util.ArrayList;
@@ -35,12 +36,12 @@ import java.util.Set;
 
 public abstract class SkillCommand implements TabExecutor {
     protected PrimarySkillType skill;
-    private String skillName;
+    private final String skillName;
 
     protected DecimalFormat percent = new DecimalFormat("##0.00%");
     protected DecimalFormat decimal = new DecimalFormat("##0.00");
 
-    private CommandExecutor skillGuideCommand;
+    private final CommandExecutor skillGuideCommand;
 
     public SkillCommand(PrimarySkillType skill) {
         this.skill = skill;
@@ -49,7 +50,7 @@ public abstract class SkillCommand implements TabExecutor {
     }
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         if (CommandUtils.noConsoleUsage(sender)) {
             return true;
         }
@@ -64,64 +65,60 @@ public abstract class SkillCommand implements TabExecutor {
             return true;
         }
 
-        switch (args.length) {
-            case 0:
-                Player player = (Player) sender;
-                McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
+        if (args.length == 0) {
+            Player player = (Player) sender;
+            McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
 
-                boolean isLucky = Permissions.lucky(player, skill);
-                boolean hasEndurance = (PerksUtils.handleActivationPerks(player, 0, 0) != 0);
-                float skillValue = mcMMOPlayer.getSkillLevel(skill);
+            boolean isLucky = Permissions.lucky(player, skill);
+            boolean hasEndurance = (PerksUtils.handleActivationPerks(player, 0, 0) != 0);
+            float skillValue = mcMMOPlayer.getSkillLevel(skill);
 
-                //Send the players a few blank lines to make finding the top of the skill command easier
-                if(AdvancedConfig.getInstance().doesSkillCommandSendBlankLines())
-                    for(int i = 0; i < 2; i++)
-                    {
-                        player.sendMessage("");
-                    }
+            //Send the players a few blank lines to make finding the top of the skill command easier
+            if (AdvancedConfig.getInstance().doesSkillCommandSendBlankLines())
+                for (int i = 0; i < 2; i++) {
+                    player.sendMessage("");
+                }
 
-                permissionsCheck(player);
-                dataCalculations(player, skillValue);
+            permissionsCheck(player);
+            dataCalculations(player, skillValue);
 
-                sendSkillCommandHeader(player, mcMMOPlayer, (int) skillValue);
+            sendSkillCommandHeader(player, mcMMOPlayer, (int) skillValue);
 
-                //Make JSON text components
-                List<TextComponent> subskillTextComponents = getTextComponents(player);
+            //Make JSON text components
+            List<TextComponent> subskillTextComponents = getTextComponents(player);
 
-                //Subskills Header
-                player.sendMessage(LocaleLoader.getString("Skills.Overhaul.Header", LocaleLoader.getString("Effects.SubSkills.Overhaul")));
+            //Subskills Header
+            player.sendMessage(LocaleLoader.getString("Skills.Overhaul.Header", LocaleLoader.getString("Effects.SubSkills.Overhaul")));
 
-                //Send JSON text components
+            //Send JSON text components
 
-                TextComponentFactory.sendPlayerSubSkillList(player, subskillTextComponents);
+            TextComponentFactory.sendPlayerSubSkillList(player, subskillTextComponents);
 
                 /*for(TextComponent tc : subskillTextComponents)
                 {
                     player.spigot().sendMessage(new TextComponent[]{tc, new TextComponent(": TESTING")});
                 }*/
 
-                //Stats
-                getStatMessages(player, isLucky, hasEndurance, skillValue);
+            //Stats
+            getStatMessages(player, isLucky, hasEndurance, skillValue);
 
-                //Header
+            //Header
 
 
-                //Link Header
-                if(Config.getInstance().getUrlLinksEnabled())
-                {
-                    player.sendMessage(LocaleLoader.getString("Overhaul.mcMMO.Header"));
-                    TextComponentFactory.sendPlayerUrlHeader(player);
-                }
+            //Link Header
+            if (Config.getInstance().getUrlLinksEnabled()) {
+                player.sendMessage(LocaleLoader.getString("Overhaul.mcMMO.Header"));
+                TextComponentFactory.sendPlayerUrlHeader(player);
+            }
 
 
-                if (Config.getInstance().getScoreboardsEnabled() && Config.getInstance().getSkillUseBoard()) {
-                    ScoreboardManager.enablePlayerSkillScoreboard(player, skill);
-                }
+            if (Config.getInstance().getScoreboardsEnabled() && Config.getInstance().getSkillUseBoard()) {
+                ScoreboardManager.enablePlayerSkillScoreboard(player, skill);
+            }
 
-                return true;
-            default:
-                return skillGuideCommand.onCommand(sender, command, label, args);
+            return true;
         }
+        return skillGuideCommand.onCommand(sender, command, label, args);
     }
 
     private void getStatMessages(Player player, boolean isLucky, boolean hasEndurance, float skillValue) {
@@ -165,31 +162,28 @@ public abstract class SkillCommand implements TabExecutor {
 
 
             Set<PrimarySkillType> parents = FamilyTree.getParents(skill);
-            ArrayList<PrimarySkillType> parentList = new ArrayList<>();
 
             //TODO: Add JSON here
-            for (PrimarySkillType parent : parents) {
-                parentList.add(parent);
-                /*player.sendMessage(parent.getName() + " - " + LocaleLoader.getString("Effects.Level.Overhaul", mcMMOPlayer.getSkillLevel(parent), mcMMOPlayer.getSkillXpLevel(parent), mcMMOPlayer.getXpToLevel(parent)))*/;
-            }
+            /*player.sendMessage(parent.getName() + " - " + LocaleLoader.getString("Effects.Level.Overhaul", mcMMOPlayer.getSkillLevel(parent), mcMMOPlayer.getSkillXpLevel(parent), mcMMOPlayer.getXpToLevel(parent)))*/
+            ArrayList<PrimarySkillType> parentList = new ArrayList<>(parents);
 
-            String parentMessage = "";
+            StringBuilder parentMessage = new StringBuilder();
 
             for(int i = 0; i < parentList.size(); i++)
             {
                 if(i+1 < parentList.size())
                 {
-                    parentMessage += LocaleLoader.getString("Effects.Child.ParentList", parentList.get(i).getName(), mcMMOPlayer.getSkillLevel(parentList.get(i)));
-                    parentMessage += ChatColor.GRAY+", ";
+                    parentMessage.append(LocaleLoader.getString("Effects.Child.ParentList", parentList.get(i).getName(), mcMMOPlayer.getSkillLevel(parentList.get(i))));
+                    parentMessage.append(ChatColor.GRAY).append(", ");
                 } else {
-                    parentMessage += LocaleLoader.getString("Effects.Child.ParentList", parentList.get(i).getName(), mcMMOPlayer.getSkillLevel(parentList.get(i)));
+                    parentMessage.append(LocaleLoader.getString("Effects.Child.ParentList", parentList.get(i).getName(), mcMMOPlayer.getSkillLevel(parentList.get(i))));
                 }
             }
 
             //XP GAIN METHOD
             player.sendMessage(LocaleLoader.getString("Commands.XPGain.Overhaul", LocaleLoader.getString("Commands.XPGain.Child")));
 
-            player.sendMessage(LocaleLoader.getString("Effects.Child.Overhaul", skillValue, parentMessage));
+            player.sendMessage(LocaleLoader.getString("Effects.Child.Overhaul", skillValue, parentMessage.toString()));
             //LEVEL
             //player.sendMessage(LocaleLoader.getString("Effects.Child.Overhaul", skillValue, skillValue));
 
@@ -215,13 +209,11 @@ public abstract class SkillCommand implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
-        switch (args.length) {
-            case 1:
-                return ImmutableList.of("?");
-            default:
-                return ImmutableList.of();
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+        if (args.length == 1) {
+            return ImmutableList.of("?");
         }
+        return ImmutableList.of();
     }
 
     protected int calculateRank(float skillValue, int maxLevel, int rankChangeLevel) {

src/main/java/com/gmail/nossr50/commands/skills/SkillGuideCommand.java

@@ -6,15 +6,16 @@ import com.gmail.nossr50.util.StringUtils;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.Arrays;
 
 public class SkillGuideCommand implements CommandExecutor {
-    private String header;
-    private ArrayList<String> guide;
+    private final String header;
+    private final ArrayList<String> guide;
 
-    private String invalidPage = LocaleLoader.getString("Guides.Page.Invalid");
+    private final String invalidPage = LocaleLoader.getString("Guides.Page.Invalid");
 
     public SkillGuideCommand(PrimarySkillType skill) {
         header = LocaleLoader.getString("Guides.Header", skill.getName());
@@ -22,7 +23,7 @@ public class SkillGuideCommand implements CommandExecutor {
     }
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         switch (args.length) {
             case 1:
                 if (!args[0].equals("?")) {
@@ -67,7 +68,7 @@ public class SkillGuideCommand implements CommandExecutor {
 
     private ArrayList<String> grabPageContents(int page) {
         int pageIndexStart = 8 * (page - 1); // Determine what string to start at
-        ArrayList<String> allStrings = new ArrayList<String>();
+        ArrayList<String> allStrings = new ArrayList<>();
 
         allStrings.add(header);
 
@@ -86,7 +87,7 @@ public class SkillGuideCommand implements CommandExecutor {
     }
 
     private ArrayList<String> getGuide(PrimarySkillType skill) {
-        ArrayList<String> guide = new ArrayList<String>();
+        ArrayList<String> guide = new ArrayList<>();
 
         for (int i = 0; i < 10; i++) {
             String[] section = LocaleLoader.getString("Guides." + StringUtils.getCapitalized(skill.toString()) + ".Section." + i).split("\n");

src/main/java/com/gmail/nossr50/commands/skills/SmeltingCommand.java

@@ -62,7 +62,7 @@ public class SmeltingCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         /*if (canFluxMine) {
             messages.add(getStatMessage(SubSkillType.SMELTING_FLUX_MINING, str_fluxMiningChance)

src/main/java/com/gmail/nossr50/commands/skills/SwordsCommand.java

@@ -68,7 +68,7 @@ public class SwordsCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         int ruptureTicks = UserManager.getPlayer(player).getSwordsManager().getRuptureBleedTicks();
         double ruptureDamagePlayers =  RankUtils.getRank(player, SubSkillType.SWORDS_RUPTURE) >= 3 ? AdvancedConfig.getInstance().getRuptureDamagePlayer() * 1.5D : AdvancedConfig.getInstance().getRuptureDamagePlayer();

src/main/java/com/gmail/nossr50/commands/skills/TamingCommand.java

@@ -56,7 +56,7 @@ public class TamingCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         if (canEnvironmentallyAware) {
             messages.add(LocaleLoader.getString("Ability.Generic.Template", LocaleLoader.getString("Taming.Ability.Bonus.0"), LocaleLoader.getString("Taming.Ability.Bonus.1")));

src/main/java/com/gmail/nossr50/commands/skills/UnarmedCommand.java

@@ -40,7 +40,7 @@ public class UnarmedCommand extends SkillCommand {
     protected void dataCalculations(Player player, float skillValue) {
         // UNARMED_ARROW_DEFLECT
         if (canDeflect) {
-            String[] deflectStrings = getAbilityDisplayValues(SkillActivationType.RANDOM_LINEAR_100_SCALE_WITH_CAP, player, SubSkillType.UNARMED_ARROW_DEFLECT);;
+            String[] deflectStrings = getAbilityDisplayValues(SkillActivationType.RANDOM_LINEAR_100_SCALE_WITH_CAP, player, SubSkillType.UNARMED_ARROW_DEFLECT);
             deflectChance = deflectStrings[0];
             deflectChanceLucky = deflectStrings[1];
         }
@@ -54,7 +54,7 @@ public class UnarmedCommand extends SkillCommand {
 
         // UNARMED_DISARM
         if (canDisarm) {
-            String[] disarmStrings = getAbilityDisplayValues(SkillActivationType.RANDOM_LINEAR_100_SCALE_WITH_CAP, player, SubSkillType.UNARMED_DISARM);;
+            String[] disarmStrings = getAbilityDisplayValues(SkillActivationType.RANDOM_LINEAR_100_SCALE_WITH_CAP, player, SubSkillType.UNARMED_DISARM);
             disarmChance = disarmStrings[0];
             disarmChanceLucky = disarmStrings[1];
         }
@@ -84,7 +84,7 @@ public class UnarmedCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         if (canDeflect) {
             messages.add(getStatMessage(SubSkillType.UNARMED_ARROW_DEFLECT, deflectChance)

src/main/java/com/gmail/nossr50/commands/skills/WoodcuttingCommand.java

@@ -46,7 +46,7 @@ public class WoodcuttingCommand extends SkillCommand {
     }
 
     private void setDoubleDropClassicChanceStrings(Player player) {
-        String[] doubleDropStrings = getAbilityDisplayValues(SkillActivationType.RANDOM_LINEAR_100_SCALE_WITH_CAP, player, SubSkillType.WOODCUTTING_HARVEST_LUMBER);;
+        String[] doubleDropStrings = getAbilityDisplayValues(SkillActivationType.RANDOM_LINEAR_100_SCALE_WITH_CAP, player, SubSkillType.WOODCUTTING_HARVEST_LUMBER);
         doubleDropChance = doubleDropStrings[0];
         doubleDropChanceLucky = doubleDropStrings[1];
     }
@@ -63,7 +63,7 @@ public class WoodcuttingCommand extends SkillCommand {
 
     @Override
     protected List<String> statsDisplay(Player player, float skillValue, boolean hasEndurance, boolean isLucky) {
-        List<String> messages = new ArrayList<String>();
+        List<String> messages = new ArrayList<>();
 
         if (canDoubleDrop) {
             messages.add(getStatMessage(SubSkillType.WOODCUTTING_HARVEST_LUMBER, doubleDropChance)

src/main/java/com/gmail/nossr50/config/AdvancedConfig.java

@@ -28,7 +28,7 @@ public class AdvancedConfig extends AutoUpdateConfigLoader {
     @Override
     protected boolean validateKeys() {
         // Validate all the settings!
-        List<String> reason = new ArrayList<String>();
+        List<String> reason = new ArrayList<>();
 
         /* GENERAL */
         if (getAbilityLength() < 1) {
@@ -687,9 +687,8 @@ public class AdvancedConfig extends AutoUpdateConfigLoader {
     }
 
     public double getMaximumProbability(SubSkillType subSkillType) {
-        double maximumProbability = config.getDouble(subSkillType.getAdvConfigAddress() + ".ChanceMax", 100.0D);
 
-        return maximumProbability;
+        return config.getDouble(subSkillType.getAdvConfigAddress() + ".ChanceMax", 100.0D);
     }
 
     public double getMaximumProbability(AbstractSubSkill abstractSubSkill)
@@ -719,6 +718,11 @@ public class AdvancedConfig extends AutoUpdateConfigLoader {
         return config.getBoolean("Feedback.Events.XP.SendTitles", true);
     }
 
+    public boolean sendAbilityNotificationToOtherPlayers()
+    {
+        return config.getBoolean("Feedback.Events.AbilityActivation.SendNotificationToOtherPlayers", true);
+    }
+
     /*
      * JSON Style Settings
      */

src/main/java/com/gmail/nossr50/config/AutoUpdateConfigLoader.java

@@ -28,10 +28,10 @@ public abstract class AutoUpdateConfigLoader extends ConfigLoader {
 
         boolean needSave = false;
 
-        Set<String> oldKeys = new HashSet<String>(configKeys);
+        Set<String> oldKeys = new HashSet<>(configKeys);
         oldKeys.removeAll(internalConfigKeys);
 
-        Set<String> newKeys = new HashSet<String>(internalConfigKeys);
+        Set<String> newKeys = new HashSet<>(internalConfigKeys);
         newKeys.removeAll(configKeys);
 
         // Don't need a re-save if we have old keys sticking around?
@@ -66,17 +66,17 @@ public abstract class AutoUpdateConfigLoader extends ConfigLoader {
             try {
                 // Read internal
                 BufferedReader reader = new BufferedReader(new InputStreamReader(plugin.getResource(fileName)));
-                LinkedHashMap<String, String> comments = new LinkedHashMap<String, String>();
-                String temp = "";
+                LinkedHashMap<String, String> comments = new LinkedHashMap<>();
+                StringBuilder temp = new StringBuilder();
 
                 String line;
                 while ((line = reader.readLine()) != null) {
                     if (line.contains("#")) {
-                        temp += line + "\n";
+                        temp.append(line).append("\n");
                     }
                     else if (line.contains(":")) {
                         line = line.substring(0, line.indexOf(":") + 1);
-                        if (!temp.isEmpty()) {
+                        if (temp.length() > 0) {
                             if(comments.containsKey(line)) {
                                 int index = 0;
                                 while(comments.containsKey(line + index)) {
@@ -86,14 +86,14 @@ public abstract class AutoUpdateConfigLoader extends ConfigLoader {
                                 line = line + index;
                             }
 
-                            comments.put(line, temp);
-                            temp = "";
+                            comments.put(line, temp.toString());
+                            temp = new StringBuilder();
                         }
                     }
                 }
 
                 // Dump to the new one
-                HashMap<String, Integer> indexed = new HashMap<String, Integer>();
+                HashMap<String, Integer> indexed = new HashMap<>();
                 for (String key : comments.keySet()) {
                     String actualkey = key.substring(0, key.indexOf(":") + 1);
 

src/main/java/com/gmail/nossr50/config/Config.java

@@ -39,7 +39,7 @@ public class Config extends AutoUpdateConfigLoader {
     @Override
     protected boolean validateKeys() {
         // Validate all the settings!
-        List<String> reason = new ArrayList<String>();
+        List<String> reason = new ArrayList<>();
 
         /* General Settings */
         if (getSaveInterval() <= 0) {

src/main/java/com/gmail/nossr50/config/ConfigLoader.java

@@ -10,7 +10,7 @@ import java.util.List;
 public abstract class ConfigLoader {
     protected static final mcMMO plugin = mcMMO.p;
     protected String fileName;
-    private File configFile;
+    private final File configFile;
     protected FileConfiguration config;
 
     public ConfigLoader(String relativePath, String fileName) {

src/main/java/com/gmail/nossr50/config/HiddenConfig.java

@@ -7,14 +7,11 @@ import java.io.InputStreamReader;
 
 public class HiddenConfig {
     private static HiddenConfig instance;
-    private String fileName;
+    private final String fileName;
     private YamlConfiguration config;
     private boolean chunkletsEnabled;
     private int conversionRate;
     private boolean useEnchantmentBuffs;
-    private int uuidConvertAmount;
-    private int mojangRateLimit;
-    private long mojangLimitPeriod;
 
     public HiddenConfig(String fileName) {
         this.fileName = fileName;
@@ -36,9 +33,6 @@ public class HiddenConfig {
             chunkletsEnabled = config.getBoolean("Options.Chunklets", true);
             conversionRate = config.getInt("Options.ConversionRate", 1);
             useEnchantmentBuffs = config.getBoolean("Options.EnchantmentBuffs", true);
-            uuidConvertAmount = config.getInt("Options.UUIDConvertAmount", 5);
-            mojangRateLimit = config.getInt("Options.MojangRateLimit", 50000);
-            mojangLimitPeriod = config.getLong("Options.MojangLimitPeriod", 600000);
         }
     }
 
@@ -53,16 +47,4 @@ public class HiddenConfig {
     public boolean useEnchantmentBuffs() {
         return useEnchantmentBuffs;
     }
-
-    public int getUUIDConvertAmount() {
-        return uuidConvertAmount;
-    }
-
-    public int getMojangRateLimit() {
-        return mojangRateLimit;
-    }
-
-    public long getMojangLimitPeriod() {
-        return mojangLimitPeriod;
-    }
 }

src/main/java/com/gmail/nossr50/config/RankConfig.java

@@ -13,7 +13,7 @@ public class RankConfig extends AutoUpdateConfigLoader {
     {
         super("skillranks.yml");
         validate();
-        this.instance = this;
+        instance = this;
     }
 
     @Override
@@ -31,7 +31,7 @@ public class RankConfig extends AutoUpdateConfigLoader {
 
     @Override
     protected boolean validateKeys() {
-        List<String> reason = new ArrayList<String>();
+        List<String> reason = new ArrayList<>();
 
         /*
          * In the future this method will check keys for all skills, but for now it only checks overhauled skills

src/main/java/com/gmail/nossr50/config/SoundConfig.java

@@ -9,7 +9,7 @@ public class SoundConfig extends AutoUpdateConfigLoader {
     {
         super("sounds.yml");
         validate();
-        this.instance = this;
+        instance = this;
     }
 
     @Override

src/main/java/com/gmail/nossr50/config/WorldBlacklist.java

@@ -11,7 +11,7 @@ import java.util.ArrayList;
  */
 public class WorldBlacklist {
     private static ArrayList<String> blacklist;
-    private mcMMO plugin;
+    private final mcMMO plugin;
 
     private final String blackListFileName = "world_blacklist.txt";
 

src/main/java/com/gmail/nossr50/config/experience/ExperienceConfig.java

@@ -38,7 +38,7 @@ public class ExperienceConfig extends AutoUpdateConfigLoader {
 
     @Override
     protected boolean validateKeys() {
-        List<String> reason = new ArrayList<String>();
+        List<String> reason = new ArrayList<>();
 
         /*
          * FORMULA SETTINGS

src/main/java/com/gmail/nossr50/config/mods/CustomArmorConfig.java

@@ -15,12 +15,12 @@ import java.util.Set;
 public class CustomArmorConfig extends ConfigLoader {
     private boolean needsUpdate = false;
 
-    public List<Material> customBoots       = new ArrayList<Material>();
-    public List<Material> customChestplates = new ArrayList<Material>();
-    public List<Material> customHelmets     = new ArrayList<Material>();
-    public List<Material> customLeggings    = new ArrayList<Material>();
+    public List<Material> customBoots       = new ArrayList<>();
+    public List<Material> customChestplates = new ArrayList<>();
+    public List<Material> customHelmets     = new ArrayList<>();
+    public List<Material> customLeggings    = new ArrayList<>();
 
-    public List<Repairable> repairables = new ArrayList<Repairable>();
+    public List<Repairable> repairables = new ArrayList<>();
 
     protected CustomArmorConfig(String fileName) {
         super("mods", fileName);

src/main/java/com/gmail/nossr50/config/mods/CustomEntityConfig.java

@@ -9,8 +9,8 @@ import org.bukkit.inventory.ItemStack;
 import java.util.HashMap;
 
 public class CustomEntityConfig extends ConfigLoader {
-    public HashMap<String, CustomEntity> customEntityClassMap = new HashMap<String, CustomEntity>();
-    public HashMap<String, CustomEntity> customEntityTypeMap  = new HashMap<String, CustomEntity>();
+    public HashMap<String, CustomEntity> customEntityClassMap = new HashMap<>();
+    public HashMap<String, CustomEntity> customEntityTypeMap  = new HashMap<>();
 
     protected CustomEntityConfig(String fileName) {
         super("mods", fileName);

src/main/java/com/gmail/nossr50/config/mods/CustomToolConfig.java

@@ -17,16 +17,16 @@ import java.util.Set;
 public class CustomToolConfig extends ConfigLoader {
     private boolean needsUpdate = false;
 
-    public List<Material> customAxes     = new ArrayList<Material>();
-    public List<Material> customBows     = new ArrayList<Material>();
-    public List<Material> customHoes     = new ArrayList<Material>();
-    public List<Material> customPickaxes = new ArrayList<Material>();
-    public List<Material> customShovels  = new ArrayList<Material>();
-    public List<Material> customSwords   = new ArrayList<Material>();
+    public List<Material> customAxes     = new ArrayList<>();
+    public List<Material> customBows     = new ArrayList<>();
+    public List<Material> customHoes     = new ArrayList<>();
+    public List<Material> customPickaxes = new ArrayList<>();
+    public List<Material> customShovels  = new ArrayList<>();
+    public List<Material> customSwords   = new ArrayList<>();
 
-    public HashMap<Material, CustomTool> customToolMap = new HashMap<Material, CustomTool>();
+    public HashMap<Material, CustomTool> customToolMap = new HashMap<>();
 
-    public List<Repairable> repairables = new ArrayList<Repairable>();
+    public List<Repairable> repairables = new ArrayList<>();
 
     protected CustomToolConfig(String fileName) {
         super("mods", fileName);

src/main/java/com/gmail/nossr50/config/party/ItemWeightConfig.java

@@ -27,7 +27,7 @@ public class ItemWeightConfig extends ConfigLoader {
     }
 
     public HashSet<Material> getMiscItems() {
-        HashSet<Material> miscItems = new HashSet<Material>();
+        HashSet<Material> miscItems = new HashSet<>();
 
         for (String item : config.getStringList("Party_Shareables.Misc_Items")) {
             Material material = Material.getMaterial(item.toUpperCase(Locale.ENGLISH));

src/main/java/com/gmail/nossr50/config/skills/alchemy/PotionConfig.java

@@ -18,16 +18,16 @@ import java.util.Map;
 public class PotionConfig extends ConfigLoader {
     private static PotionConfig instance;
 
-    private List<ItemStack> concoctionsIngredientsTierOne = new ArrayList<ItemStack>();
-    private List<ItemStack> concoctionsIngredientsTierTwo = new ArrayList<ItemStack>();
-    private List<ItemStack> concoctionsIngredientsTierThree = new ArrayList<ItemStack>();
-    private List<ItemStack> concoctionsIngredientsTierFour = new ArrayList<ItemStack>();
-    private List<ItemStack> concoctionsIngredientsTierFive = new ArrayList<ItemStack>();
-    private List<ItemStack> concoctionsIngredientsTierSix = new ArrayList<ItemStack>();
-    private List<ItemStack> concoctionsIngredientsTierSeven = new ArrayList<ItemStack>();
-    private List<ItemStack> concoctionsIngredientsTierEight = new ArrayList<ItemStack>();
+    private final List<ItemStack> concoctionsIngredientsTierOne = new ArrayList<>();
+    private final List<ItemStack> concoctionsIngredientsTierTwo = new ArrayList<>();
+    private final List<ItemStack> concoctionsIngredientsTierThree = new ArrayList<>();
+    private final List<ItemStack> concoctionsIngredientsTierFour = new ArrayList<>();
+    private final List<ItemStack> concoctionsIngredientsTierFive = new ArrayList<>();
+    private final List<ItemStack> concoctionsIngredientsTierSix = new ArrayList<>();
+    private final List<ItemStack> concoctionsIngredientsTierSeven = new ArrayList<>();
+    private final List<ItemStack> concoctionsIngredientsTierEight = new ArrayList<>();
 
-    private Map<String, AlchemyPotion> potionMap = new HashMap<String, AlchemyPotion>();
+    private final Map<String, AlchemyPotion> potionMap = new HashMap<>();
 
     private PotionConfig() {
         super("potions.yml");
@@ -137,14 +137,14 @@ public class PotionConfig extends ConfigLoader {
                 material = Material.valueOf(mat);
             }
 
-            List<String> lore = new ArrayList<String>();
+            List<String> lore = new ArrayList<>();
             if (potion_section.contains("Lore")) {
                 for (String line : potion_section.getStringList("Lore")) {
                     lore.add(ChatColor.translateAlternateColorCodes('&', line));
                 }
             }
 
-            List<PotionEffect> effects = new ArrayList<PotionEffect>();
+            List<PotionEffect> effects = new ArrayList<>();
             if (potion_section.contains("Effects")) {
                 for (String effect : potion_section.getStringList("Effects")) {
                     String[] parts = effect.split(" ");
@@ -162,7 +162,7 @@ public class PotionConfig extends ConfigLoader {
                 }
             }
             
-            Color color = null;
+            Color color;
             if (potion_section.contains("Color")) {
                 color = Color.fromRGB(potion_section.getInt("Color"));
             }
@@ -170,7 +170,7 @@ public class PotionConfig extends ConfigLoader {
                 color = this.generateColor(effects);
             }
 
-            Map<ItemStack, String> children = new HashMap<ItemStack, String>();
+            Map<ItemStack, String> children = new HashMap<>();
             if (potion_section.contains("Children")) {
                 for (String child : potion_section.getConfigurationSection("Children").getKeys(false)) {
                     ItemStack ingredient = loadIngredient(child);
@@ -255,7 +255,7 @@ public class PotionConfig extends ConfigLoader {
     
     public Color generateColor(List<PotionEffect> effects) {
         if (effects != null && !effects.isEmpty()) {
-            List<Color> colors = new ArrayList<Color>();
+            List<Color> colors = new ArrayList<>();
             for (PotionEffect effect : effects) {
                 if (effect.getType().getColor() != null) {
                     colors.add(effect.getType().getColor());
@@ -280,8 +280,7 @@ public class PotionConfig extends ConfigLoader {
             green += color.getGreen();
             blue += color.getBlue();
         }
-        Color color = Color.fromRGB(red/colors.size(), green/colors.size(), blue/colors.size());
-        return color;
+        return Color.fromRGB(red/colors.size(), green/colors.size(), blue/colors.size());
     }
     
 }

src/main/java/com/gmail/nossr50/config/skills/repair/RepairConfig.java

@@ -15,7 +15,7 @@ import java.util.*;
 
 public class RepairConfig extends ConfigLoader {
     private List<Repairable> repairables;
-    private HashSet<String> notSupported;
+    private final HashSet<String> notSupported;
 
     public RepairConfig(String fileName) {
         super(fileName);
@@ -25,7 +25,7 @@ public class RepairConfig extends ConfigLoader {
 
     @Override
     protected void loadKeys() {
-        repairables = new ArrayList<Repairable>();
+        repairables = new ArrayList<>();
 
         if (!config.isConfigurationSection("Repairables")) {
             mcMMO.p.getLogger().severe("Could not find Repairables section in " + fileName);
@@ -42,7 +42,7 @@ public class RepairConfig extends ConfigLoader {
             }
 
             // Validate all the things!
-            List<String> reason = new ArrayList<String>();
+            List<String> reason = new ArrayList<>();
 
             // Item Material
             Material itemMaterial = Material.matchMaterial(key);
@@ -177,7 +177,7 @@ public class RepairConfig extends ConfigLoader {
     }
 
     protected List<Repairable> getLoadedRepairables() {
-        return repairables == null ? new ArrayList<Repairable>() : repairables;
+        return repairables == null ? new ArrayList<>() : repairables;
     }
 
     private boolean noErrorsInRepairable(List<String> issues) {

src/main/java/com/gmail/nossr50/config/skills/repair/RepairConfigManager.java

@@ -11,7 +11,7 @@ import java.util.List;
 import java.util.regex.Pattern;
 
 public class RepairConfigManager {
-    private final List<Repairable> repairables = new ArrayList<Repairable>();
+    private final List<Repairable> repairables = new ArrayList<>();
 
     public RepairConfigManager(mcMMO plugin) {
         Pattern pattern = Pattern.compile("repair\\.(?:.+)\\.yml");

src/main/java/com/gmail/nossr50/config/skills/salvage/SalvageConfig.java

@@ -18,7 +18,7 @@ import java.util.*;
 
 public class SalvageConfig extends ConfigLoader {
     private List<Salvageable> salvageables;
-    private HashSet<String> notSupported;
+    private final HashSet<String> notSupported;
 
     public SalvageConfig(String fileName) {
         super(fileName);
@@ -28,7 +28,7 @@ public class SalvageConfig extends ConfigLoader {
 
     @Override
     protected void loadKeys() {
-        salvageables = new ArrayList<Salvageable>();
+        salvageables = new ArrayList<>();
 
         if (!config.isConfigurationSection("Salvageables")) {
             mcMMO.p.getLogger().severe("Could not find Salvageables section in " + fileName);
@@ -59,7 +59,7 @@ public class SalvageConfig extends ConfigLoader {
 
         for (String key : keys) {
             // Validate all the things!
-            List<String> reason = new ArrayList<String>();
+            List<String> reason = new ArrayList<>();
 
             // Item Material
             Material itemMaterial = Material.matchMaterial(key);
@@ -195,7 +195,7 @@ public class SalvageConfig extends ConfigLoader {
     }
 
     protected List<Salvageable> getLoadedSalvageables() {
-        return salvageables == null ? new ArrayList<Salvageable>() : salvageables;
+        return salvageables == null ? new ArrayList<>() : salvageables;
     }
 
     private boolean noErrorsInSalvageable(List<String> issues) {

src/main/java/com/gmail/nossr50/config/skills/salvage/SalvageConfigManager.java

@@ -11,7 +11,7 @@ import java.util.List;
 import java.util.regex.Pattern;
 
 public class SalvageConfigManager {
-    private final List<Salvageable> salvageables = new ArrayList<Salvageable>();
+    private final List<Salvageable> salvageables = new ArrayList<>();
 
     public SalvageConfigManager(mcMMO plugin) {
         Pattern pattern = Pattern.compile("salvage\\.(?:.+)\\.yml");

src/main/java/com/gmail/nossr50/config/treasure/TreasureConfig.java

@@ -24,13 +24,13 @@ public class TreasureConfig extends ConfigLoader {
 
     private static TreasureConfig instance;
 
-    public HashMap<String, List<ExcavationTreasure>> excavationMap = new HashMap<String, List<ExcavationTreasure>>();
+    public HashMap<String, List<ExcavationTreasure>> excavationMap = new HashMap<>();
 
-    public HashMap<EntityType, List<ShakeTreasure>> shakeMap  = new HashMap<EntityType, List<ShakeTreasure>>();
-    public HashMap<String, List<HylianTreasure>>    hylianMap = new HashMap<String, List<HylianTreasure>>();
+    public HashMap<EntityType, List<ShakeTreasure>> shakeMap  = new HashMap<>();
+    public HashMap<String, List<HylianTreasure>>    hylianMap = new HashMap<>();
 
-    public HashMap<Rarity, List<FishingTreasure>>     fishingRewards      = new HashMap<Rarity, List<FishingTreasure>>();
-    public HashMap<Rarity, List<EnchantmentTreasure>> fishingEnchantments = new HashMap<Rarity, List<EnchantmentTreasure>>();
+    public HashMap<Rarity, List<FishingTreasure>>     fishingRewards      = new HashMap<>();
+    public HashMap<Rarity, List<EnchantmentTreasure>> fishingEnchantments = new HashMap<>();
 
     private TreasureConfig() {
         super("treasures.yml");
@@ -49,7 +49,7 @@ public class TreasureConfig extends ConfigLoader {
     @Override
     protected boolean validateKeys() {
         // Validate all the settings!
-        List<String> reason = new ArrayList<String>();
+        List<String> reason = new ArrayList<>();
         for (String tier : config.getConfigurationSection("Enchantment_Drop_Rates").getKeys(false)) {
             double totalEnchantDropRate = 0;
             double totalItemDropRate = 0;
@@ -116,13 +116,13 @@ public class TreasureConfig extends ConfigLoader {
         // Initialize fishing HashMap
         for (Rarity rarity : Rarity.values()) {
             if (!fishingRewards.containsKey(rarity)) {
-                fishingRewards.put(rarity, (new ArrayList<FishingTreasure>()));
+                fishingRewards.put(rarity, (new ArrayList<>()));
             }
         }
 
         for (String treasureName : treasureSection.getKeys(false)) {
             // Validate all the things!
-            List<String> reason = new ArrayList<String>();
+            List<String> reason = new ArrayList<>();
 
             String[] treasureInfo = treasureName.split("[|]");
             String materialName = treasureInfo[0];
@@ -135,7 +135,7 @@ public class TreasureConfig extends ConfigLoader {
             if (materialName.contains("INVENTORY")) {
                 // Use magic material BEDROCK to know that we're grabbing something from the inventory and not a normal treasure
                 if (!shakeMap.containsKey(EntityType.PLAYER))
-                    shakeMap.put(EntityType.PLAYER, new ArrayList<ShakeTreasure>());
+                    shakeMap.put(EntityType.PLAYER, new ArrayList<>());
                 shakeMap.get(EntityType.PLAYER).add(new ShakeTreasure(new ItemStack(Material.BEDROCK, 1, (byte) 0), 1, getInventoryStealDropChance(), getInventoryStealDropLevel()));
                 continue;
             } else {
@@ -218,7 +218,7 @@ public class TreasureConfig extends ConfigLoader {
                     }
 
                     if (config.contains(type + "." + treasureName + ".Lore")) {
-                        List<String> lore = new ArrayList<String>();
+                        List<String> lore = new ArrayList<>();
                         for (String s : config.getStringList(type + "." + treasureName + ".Lore")) {
                             lore.add(ChatColor.translateAlternateColorCodes('&', s));
                         }
@@ -237,7 +237,7 @@ public class TreasureConfig extends ConfigLoader {
 
                 if (config.contains(type + "." + treasureName + ".Lore")) {
                     ItemMeta itemMeta = item.getItemMeta();
-                    List<String> lore = new ArrayList<String>();
+                    List<String> lore = new ArrayList<>();
                     for (String s : config.getStringList(type + "." + treasureName + ".Lore")) {
                         lore.add(ChatColor.translateAlternateColorCodes('&', s));
                     }
@@ -254,7 +254,7 @@ public class TreasureConfig extends ConfigLoader {
 
                     EntityType entityType = EntityType.valueOf(type.substring(6));
                     if (!shakeMap.containsKey(entityType))
-                        shakeMap.put(entityType, new ArrayList<ShakeTreasure>());
+                        shakeMap.put(entityType, new ArrayList<>());
                     shakeMap.get(entityType).add(shakeTreasure);
                 } else if (isExcavation) {
                     ExcavationTreasure excavationTreasure = new ExcavationTreasure(item, xp, dropChance, dropLevel);
@@ -262,7 +262,7 @@ public class TreasureConfig extends ConfigLoader {
 
                     for (String blockType : dropList) {
                         if (!excavationMap.containsKey(blockType))
-                            excavationMap.put(blockType, new ArrayList<ExcavationTreasure>());
+                            excavationMap.put(blockType, new ArrayList<>());
                         excavationMap.get(blockType).add(excavationTreasure);
                     }
                 } else if (isHylian) {
@@ -305,7 +305,7 @@ public class TreasureConfig extends ConfigLoader {
 
     private void AddHylianTreasure(String dropper, HylianTreasure treasure) {
         if (!hylianMap.containsKey(dropper))
-            hylianMap.put(dropper, new ArrayList<HylianTreasure>());
+            hylianMap.put(dropper, new ArrayList<>());
         hylianMap.get(dropper).add(treasure);
     }
 
@@ -316,7 +316,7 @@ public class TreasureConfig extends ConfigLoader {
             }
 
             if (!fishingEnchantments.containsKey(rarity)) {
-                fishingEnchantments.put(rarity, (new ArrayList<EnchantmentTreasure>()));
+                fishingEnchantments.put(rarity, (new ArrayList<>()));
             }
 
             ConfigurationSection enchantmentSection = config.getConfigurationSection("Enchantments_Rarity." + rarity.toString());

src/main/java/com/gmail/nossr50/database/DatabaseManager.java

@@ -12,19 +12,19 @@ import java.util.UUID;
 
 public interface DatabaseManager {
     // One month in milliseconds
-    public final long PURGE_TIME = 2630000000L * Config.getInstance().getOldUsersCutoff();
+    long PURGE_TIME = 2630000000L * Config.getInstance().getOldUsersCutoff();
     // During convertUsers, how often to output a status
-    public final int progressInterval = 200;
+    int progressInterval = 200;
 
     /**
      * Purge users with 0 power level from the database.
      */
-    public void purgePowerlessUsers();
+    void purgePowerlessUsers();
 
     /**
      * Purge users who haven't logged on in over a certain time frame from the database.
      */
-    public void purgeOldUsers();
+    void purgeOldUsers();
 
     /**
      * Remove a user from the database.
@@ -33,14 +33,14 @@ public interface DatabaseManager {
      * @param uuid player UUID, can be null
      * @return true if the user was successfully removed, false otherwise
      */
-    public boolean removeUser(String playerName, UUID uuid);
+    boolean removeUser(String playerName, UUID uuid);
 
     /**
      * Removes any cache used for faster lookups
      * Currently only used for SQL
      * @param uuid target UUID to cleanup
      */
-    public void cleanupUser(UUID uuid);
+    void cleanupUser(UUID uuid);
 
     /**
      * Save a user to the database.
@@ -48,7 +48,7 @@ public interface DatabaseManager {
      * @param profile The profile of the player to save
      * @return true if successful, false on failure
      */
-    public boolean saveUser(PlayerProfile profile);
+    boolean saveUser(PlayerProfile profile);
 
     /**
     * Retrieve leaderboard info.
@@ -58,7 +58,7 @@ public interface DatabaseManager {
     * @param statsPerPage The number of stats per page
     * @return the requested leaderboard information
     */
-    public List<PlayerStat> readLeaderboard(PrimarySkillType skill, int pageNumber, int statsPerPage);
+    List<PlayerStat> readLeaderboard(PrimarySkillType skill, int pageNumber, int statsPerPage);
 
     /**
      * Retrieve rank info into a HashMap from PrimarySkillType to the rank.
@@ -69,7 +69,7 @@ public interface DatabaseManager {
      * @param playerName The name of the user to retrieve the rankings for
      * @return the requested rank information
      */
-    public Map<PrimarySkillType, Integer> readRank(String playerName);
+    Map<PrimarySkillType, Integer> readRank(String playerName);
 
     /**
      * Add a new user to the database.
@@ -77,7 +77,7 @@ public interface DatabaseManager {
      * @param playerName The name of the player to be added to the database
      * @param uuid The uuid of the player to be added to the database
      */
-    public void newUser(String playerName, UUID uuid);
+    void newUser(String playerName, UUID uuid);
 
     /**
      * Load a player from the database.
@@ -91,7 +91,7 @@ public interface DatabaseManager {
      *          and createNew is false
      */
     @Deprecated
-    public PlayerProfile loadPlayerProfile(String playerName, boolean createNew);
+    PlayerProfile loadPlayerProfile(String playerName, boolean createNew);
 
     /**
      * Load a player from the database.
@@ -99,7 +99,7 @@ public interface DatabaseManager {
      * @param uuid The uuid of the player to load from the database
      * @return The player's data, or an unloaded PlayerProfile if not found
      */
-    public PlayerProfile loadPlayerProfile(UUID uuid);
+    PlayerProfile loadPlayerProfile(UUID uuid);
 
     /**
      * Load a player from the database. Attempt to use uuid, fall back on playername
@@ -111,14 +111,14 @@ public interface DatabaseManager {
      * @return The player's data, or an unloaded PlayerProfile if not found
      *          and createNew is false
      */
-    public PlayerProfile loadPlayerProfile(String playerName, UUID uuid, boolean createNew);
+    PlayerProfile loadPlayerProfile(String playerName, UUID uuid, boolean createNew);
 
     /**
      * Get all users currently stored in the database.
      *
      * @return list of playernames
      */
-    public List<String> getStoredUsers();
+    List<String> getStoredUsers();
 
     /**
      * Convert all users from this database to the provided database using
@@ -126,21 +126,21 @@ public interface DatabaseManager {
      *
      * @param destination The DatabaseManager to save to
      */
-    public void convertUsers(DatabaseManager destination);
+    void convertUsers(DatabaseManager destination);
 
-    public boolean saveUserUUID(String userName, UUID uuid);
+    boolean saveUserUUID(String userName, UUID uuid);
 
-    public boolean saveUserUUIDs(Map<String, UUID> fetchedUUIDs);
+    boolean saveUserUUIDs(Map<String, UUID> fetchedUUIDs);
 
     /**
      * Retrieve the type of database in use. Custom databases should return CUSTOM.
      *
      * @return The type of database
      */
-    public DatabaseType getDatabaseType();
+    DatabaseType getDatabaseType();
 
     /**
      * Called when the plugin disables
      */
-    public void onDisable();
+    void onDisable();
 }

src/main/java/com/gmail/nossr50/database/FlatfileDatabaseManager.java

@@ -22,8 +22,8 @@ import java.io.*;
 import java.util.*;
 
 public final class FlatfileDatabaseManager implements DatabaseManager {
-    private final HashMap<PrimarySkillType, List<PlayerStat>> playerStatHash = new HashMap<PrimarySkillType, List<PlayerStat>>();
-    private final List<PlayerStat> powerLevels = new ArrayList<PlayerStat>();
+    private final HashMap<PrimarySkillType, List<PlayerStat>> playerStatHash = new HashMap<>();
+    private final List<PlayerStat> powerLevels = new ArrayList<>();
     private long lastUpdate = 0;
 
     private final long UPDATE_WAIT_TIME = 600000L; // 10 minutes
@@ -36,7 +36,7 @@ public final class FlatfileDatabaseManager implements DatabaseManager {
         updateLeaderboards();
 
         if (mcMMO.getUpgradeManager().shouldUpgrade(UpgradeType.ADD_UUIDS)) {
-            new UUIDUpdateAsyncTask(mcMMO.p, getStoredUsers()).runTaskAsynchronously(mcMMO.p);
+            new UUIDUpdateAsyncTask(mcMMO.p, getStoredUsers()).start();
         }
     }
 
@@ -425,7 +425,7 @@ public final class FlatfileDatabaseManager implements DatabaseManager {
     public Map<PrimarySkillType, Integer> readRank(String playerName) {
         updateLeaderboards();
 
-        Map<PrimarySkillType, Integer> skills = new HashMap<PrimarySkillType, Integer>();
+        Map<PrimarySkillType, Integer> skills = new HashMap<>();
 
         for (PrimarySkillType skill : PrimarySkillType.NON_CHILD_SKILLS) {
             skills.put(skill, getPlayerRank(playerName, playerStatHash.get(skill)));
@@ -734,7 +734,7 @@ public final class FlatfileDatabaseManager implements DatabaseManager {
                         }
 
                         character[UUID_INDEX] = fetchedUUIDs.remove(character[USERNAME]).toString();
-                        line = new StringBuilder(org.apache.commons.lang.StringUtils.join(character, ":")).append(":").toString();
+                        line = org.apache.commons.lang.StringUtils.join(character, ":") + ":";
                     }
 
                     i++;
@@ -772,7 +772,7 @@ public final class FlatfileDatabaseManager implements DatabaseManager {
     }
 
     public List<String> getStoredUsers() {
-        ArrayList<String> users = new ArrayList<String>();
+        ArrayList<String> users = new ArrayList<>();
         BufferedReader in = null;
         String usersFilePath = mcMMO.getUsersFilePath();
 
@@ -818,19 +818,19 @@ public final class FlatfileDatabaseManager implements DatabaseManager {
         powerLevels.clear(); // Clear old values from the power levels
 
         // Initialize lists
-        List<PlayerStat> mining = new ArrayList<PlayerStat>();
-        List<PlayerStat> woodcutting = new ArrayList<PlayerStat>();
-        List<PlayerStat> herbalism = new ArrayList<PlayerStat>();
-        List<PlayerStat> excavation = new ArrayList<PlayerStat>();
-        List<PlayerStat> acrobatics = new ArrayList<PlayerStat>();
-        List<PlayerStat> repair = new ArrayList<PlayerStat>();
-        List<PlayerStat> swords = new ArrayList<PlayerStat>();
-        List<PlayerStat> axes = new ArrayList<PlayerStat>();
-        List<PlayerStat> archery = new ArrayList<PlayerStat>();
-        List<PlayerStat> unarmed = new ArrayList<PlayerStat>();
-        List<PlayerStat> taming = new ArrayList<PlayerStat>();
-        List<PlayerStat> fishing = new ArrayList<PlayerStat>();
-        List<PlayerStat> alchemy = new ArrayList<PlayerStat>();
+        List<PlayerStat> mining = new ArrayList<>();
+        List<PlayerStat> woodcutting = new ArrayList<>();
+        List<PlayerStat> herbalism = new ArrayList<>();
+        List<PlayerStat> excavation = new ArrayList<>();
+        List<PlayerStat> acrobatics = new ArrayList<>();
+        List<PlayerStat> repair = new ArrayList<>();
+        List<PlayerStat> swords = new ArrayList<>();
+        List<PlayerStat> axes = new ArrayList<>();
+        List<PlayerStat> archery = new ArrayList<>();
+        List<PlayerStat> unarmed = new ArrayList<>();
+        List<PlayerStat> taming = new ArrayList<>();
+        List<PlayerStat> fishing = new ArrayList<>();
+        List<PlayerStat> alchemy = new ArrayList<>();
 
         BufferedReader in = null;
         String playerName = null;
@@ -881,20 +881,20 @@ public final class FlatfileDatabaseManager implements DatabaseManager {
 
         SkillComparator c = new SkillComparator();
 
-        Collections.sort(mining, c);
-        Collections.sort(woodcutting, c);
-        Collections.sort(repair, c);
-        Collections.sort(unarmed, c);
-        Collections.sort(herbalism, c);
-        Collections.sort(excavation, c);
-        Collections.sort(archery, c);
-        Collections.sort(swords, c);
-        Collections.sort(axes, c);
-        Collections.sort(acrobatics, c);
-        Collections.sort(taming, c);
-        Collections.sort(fishing, c);
-        Collections.sort(alchemy, c);
-        Collections.sort(powerLevels, c);
+        mining.sort(c);
+        woodcutting.sort(c);
+        repair.sort(c);
+        unarmed.sort(c);
+        herbalism.sort(c);
+        excavation.sort(c);
+        archery.sort(c);
+        swords.sort(c);
+        axes.sort(c);
+        acrobatics.sort(c);
+        taming.sort(c);
+        fishing.sort(c);
+        alchemy.sort(c);
+        powerLevels.sort(c);
 
         playerStatHash.put(PrimarySkillType.MINING, mining);
         playerStatHash.put(PrimarySkillType.WOODCUTTING, woodcutting);
@@ -925,8 +925,8 @@ public final class FlatfileDatabaseManager implements DatabaseManager {
                     in = new BufferedReader(new FileReader(usersFilePath));
                     StringBuilder writer = new StringBuilder();
                     String line;
-                    HashSet<String> usernames = new HashSet<String>();
-                    HashSet<String> players = new HashSet<String>();
+                    HashSet<String> usernames = new HashSet<>();
+                    HashSet<String> players = new HashSet<>();
 
                     while ((line = in.readLine()) != null) {
                         // Remove empty lines from the file
@@ -1196,7 +1196,7 @@ public final class FlatfileDatabaseManager implements DatabaseManager {
                         }
 
                         if (updated) {
-                            line = new StringBuilder(org.apache.commons.lang.StringUtils.join(character, ":")).append(":").toString();
+                            line = org.apache.commons.lang.StringUtils.join(character, ":") + ":";
                         }
 
                         writer.append(line).append("\r\n");
@@ -1273,7 +1273,7 @@ public final class FlatfileDatabaseManager implements DatabaseManager {
         return statValue;
     }
 
-    private class SkillComparator implements Comparator<PlayerStat> {
+    private static class SkillComparator implements Comparator<PlayerStat> {
         @Override
         public int compare(PlayerStat o1, PlayerStat o2) {
             return (o2.statVal - o1.statVal);
@@ -1376,7 +1376,7 @@ public final class FlatfileDatabaseManager implements DatabaseManager {
     }
 
     private Map<PrimarySkillType, Integer> getSkillMapFromLine(String[] character) {
-        Map<PrimarySkillType, Integer> skills = new EnumMap<PrimarySkillType, Integer>(PrimarySkillType.class);   // Skill & Level
+        Map<PrimarySkillType, Integer> skills = new EnumMap<>(PrimarySkillType.class);   // Skill & Level
 
         skills.put(PrimarySkillType.TAMING, Integer.valueOf(character[SKILLS_TAMING]));
         skills.put(PrimarySkillType.MINING, Integer.valueOf(character[SKILLS_MINING]));

src/main/java/com/gmail/nossr50/database/SQLDatabaseManager.java

@@ -24,9 +24,9 @@ import java.util.concurrent.locks.ReentrantLock;
 
 public final class SQLDatabaseManager implements DatabaseManager {
     private static final String ALL_QUERY_VERSION = "total";
-    private String tablePrefix = Config.getInstance().getMySQLTablePrefix();
+    private final String tablePrefix = Config.getInstance().getMySQLTablePrefix();
 
-    private final Map<UUID, Integer> cachedUserIDs = new HashMap<UUID, Integer>();
+    private final Map<UUID, Integer> cachedUserIDs = new HashMap<>();
 
     private DataSource miscPool;
     private DataSource loadPool;
@@ -34,7 +34,7 @@ public final class SQLDatabaseManager implements DatabaseManager {
 
     private boolean debug = false;
 
-    private ReentrantLock massUpdateLock = new ReentrantLock();
+    private final ReentrantLock massUpdateLock = new ReentrantLock();
 
     protected SQLDatabaseManager() {
         String connectionString = "jdbc:mysql://" + Config.getInstance().getMySQLServerName()
@@ -215,8 +215,7 @@ public final class SQLDatabaseManager implements DatabaseManager {
     }
 
     public void cleanupUser(UUID uuid) {
-        if(cachedUserIDs.containsKey(uuid))
-            cachedUserIDs.remove(uuid);
+        cachedUserIDs.remove(uuid);
     }
 
     public boolean saveUser(PlayerProfile profile) {
@@ -346,7 +345,7 @@ public final class SQLDatabaseManager implements DatabaseManager {
     }
 
     public List<PlayerStat> readLeaderboard(PrimarySkillType skill, int pageNumber, int statsPerPage) {
-        List<PlayerStat> stats = new ArrayList<PlayerStat>();
+        List<PlayerStat> stats = new ArrayList<>();
 
         String query = skill == null ? ALL_QUERY_VERSION : skill.name().toLowerCase(Locale.ENGLISH);
         ResultSet resultSet = null;
@@ -361,13 +360,13 @@ public final class SQLDatabaseManager implements DatabaseManager {
             resultSet = statement.executeQuery();
 
             while (resultSet.next()) {
-                ArrayList<String> column = new ArrayList<String>();
+                ArrayList<String> column = new ArrayList<>();
 
                 for (int i = 1; i <= resultSet.getMetaData().getColumnCount(); i++) {
                     column.add(resultSet.getString(i));
                 }
 
-                stats.add(new PlayerStat(column.get(1), Integer.valueOf(column.get(0))));
+                stats.add(new PlayerStat(column.get(1), Integer.parseInt(column.get(0))));
             }
         }
         catch (SQLException ex) {
@@ -383,7 +382,7 @@ public final class SQLDatabaseManager implements DatabaseManager {
     }
 
     public Map<PrimarySkillType, Integer> readRank(String playerName) {
-        Map<PrimarySkillType, Integer> skills = new HashMap<PrimarySkillType, Integer>();
+        Map<PrimarySkillType, Integer> skills = new HashMap<>();
 
         ResultSet resultSet = null;
         PreparedStatement statement = null;
@@ -753,7 +752,7 @@ public final class SQLDatabaseManager implements DatabaseManager {
     }
 
     public List<String> getStoredUsers() {
-        ArrayList<String> users = new ArrayList<String>();
+        ArrayList<String> users = new ArrayList<>();
 
         Statement statement = null;
         Connection connection = null;
@@ -1319,7 +1318,7 @@ public final class SQLDatabaseManager implements DatabaseManager {
     private class GetUUIDUpdatesRequired extends BukkitRunnable {
         public void run() {
             massUpdateLock.lock();
-            List<String> names = new ArrayList<String>();
+            List<String> names = new ArrayList<>();
             Connection connection = null;
             Statement statement = null;
             ResultSet resultSet = null;
@@ -1341,7 +1340,9 @@ public final class SQLDatabaseManager implements DatabaseManager {
                 }
 
                 if (!names.isEmpty()) {
-                    new UUIDUpdateAsyncTask(mcMMO.p, names).run();
+                    UUIDUpdateAsyncTask updateTask = new UUIDUpdateAsyncTask(mcMMO.p, names);
+                    updateTask.start();
+                    updateTask.waitUntilFinished();
                 }
             } finally {
                 massUpdateLock.unlock();
@@ -1489,9 +1490,8 @@ public final class SQLDatabaseManager implements DatabaseManager {
             resultSet = statement.executeQuery();
 
             if (resultSet.next()) {
-                int id = resultSet.getInt("id");
 
-                return id;
+                return resultSet.getInt("id");
             }
         }
         catch (SQLException ex) {

src/main/java/com/gmail/nossr50/datatypes/BlockSnapshot.java

@@ -9,7 +9,7 @@ import org.bukkit.block.Block;
  */
 public class BlockSnapshot {
     private final Material oldType;
-    private Block blockRef;
+    private final Block blockRef;
 
     public BlockSnapshot(Material oldType, Block blockRef) {
         this.oldType = oldType;