add missing defaults and constructor for database config

src/main/java/com/gmail/nossr50/config/hocon/database/ConfigCategoryDatabase.java

@@ -7,16 +7,16 @@ import ninja.leaping.configurate.objectmapping.serialize.ConfigSerializable;
 public class ConfigCategoryDatabase {
 
     @Setting(value = "User_Name", comment = "The authorized user for your MySQL/MariaDB DB")
-    private String username;
+    private String username = "example_user_name";
 
     @Setting(value = "User_Password", comment = "The password for your authorized user")
-    private String password;
+    private String password = "example_user_password";
 
     @Setting(value = "Database_Name", comment = "The database name for your DB, this DB must already exist on the SQL server.")
-    private String databaseName;
+    private String databaseName = "example_database_name";
 
     @Setting(value = "Table_Prefix", comment = "The Prefix that will be used for tables in your DB")
-    private String tablePrefix;
+    private String tablePrefix = "mcmmo_";
 
     @Setting(value = "Max_Connections", comment = "This setting is the max simultaneous MySQL/MariaDB connections allowed at a time, this needs to be high enough to support multiple player logins in quick succession")
     private ConfigCategoryMaxConnections configCategoryMaxConnections;

src/main/java/com/gmail/nossr50/config/hocon/database/ConfigCategoryMaxConnections.java

@@ -7,12 +7,12 @@ import ninja.leaping.configurate.objectmapping.serialize.ConfigSerializable;
 public class ConfigCategoryMaxConnections {
 
     @Setting(value = "Misc")
-    private int misc;
+    private int misc = 30;
 
     @Setting(value = "Load")
-    private int load;
+    private int load = 30;
 
     @Setting(value = "Save")
-    private int save;
+    private int save = 30;
 
 }

src/main/java/com/gmail/nossr50/config/hocon/database/ConfigCategoryMaxPoolSize.java

@@ -6,11 +6,11 @@ import ninja.leaping.configurate.objectmapping.serialize.ConfigSerializable;
 @ConfigSerializable
 public class ConfigCategoryMaxPoolSize {
     @Setting(value = "Misc")
-    private int misc;
+    private int misc = 10;
 
     @Setting(value = "Load")
-    private int load;
+    private int load = 20;
 
     @Setting(value = "Save")
-    private int save;
+    private int save = 20;
 }

src/main/java/com/gmail/nossr50/config/hocon/database/ConfigCategoryMySQL.java

@@ -7,7 +7,7 @@ import ninja.leaping.configurate.objectmapping.serialize.ConfigSerializable;
 public class ConfigCategoryMySQL {
 
     @Setting(value = "Enabled", comment = "If set to true, mcMMO will use MySQL/MariaDB instead of FlatFile storage")
-    private boolean enabled;
+    private boolean enabled = true;
 
     @Setting(value = "Database", comment = "Database settings for MySQL/MariaDB")
     private ConfigCategoryDatabase configCategoryDatabase;

src/main/java/com/gmail/nossr50/config/hocon/database/ConfigDatabase.java

@@ -1,12 +1,32 @@
 package com.gmail.nossr50.config.hocon.database;
 
+import com.gmail.nossr50.config.Config;
+import com.gmail.nossr50.config.ConfigConstants;
 import ninja.leaping.configurate.objectmapping.Setting;
 import ninja.leaping.configurate.objectmapping.serialize.ConfigSerializable;
 
 @ConfigSerializable
-public class ConfigDatabase {
+public class ConfigDatabase extends Config {
 
     @Setting(value = "MySQL", comment = "Settings for using MySQL or MariaDB database")
     private ConfigCategoryMySQL configCategoryMySQL;
 
+    public ConfigDatabase() {
+        super(ConfigConstants.getDataFolder(), ConfigConstants.RELATIVE_PATH_CONFIG_DIR, true, false, true);
+    }
+
+    @Override
+    public void unload() {
+
+    }
+
+    /**
+     * The version of this config
+     *
+     * @return
+     */
+    @Override
+    public double getConfigVersion() {
+        return 1;
+    }
 }