Adds comments to all custom events

Adds full comments to every class implementing StarGateEvent
Adds another abstract event StargatePlayerEvent which reduces code duplication

src/main/java/net/knarcraft/stargate/event/StargateAccessEvent.java

@@ -3,24 +3,18 @@ package net.knarcraft.stargate.event;
 import net.knarcraft.stargate.Portal;
 import org.bukkit.entity.Player;
 import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
 
+/**
+ * This event should be called whenever a player attempts to access a stargate
+ */
 @SuppressWarnings("unused")
-public class StargateAccessEvent extends StargateEvent {
+public class StargateAccessEvent extends StargatePlayerEvent {
 
-	private final Player player;
 	private boolean deny;
 	
 	private static final HandlerList handlers = new HandlerList();
 
-
-    /**
-     * Gets a handler-list containing all event handlers
-     * @return <p>A handler-list with all event handlers</p>
-     */
-	public static HandlerList getHandlerList() {
-		return handlers;
-	}
-
     /**
      * Instantiates a new stargate access event
      * @param player <p>The player involved in the vent</p>
@@ -28,9 +22,8 @@ public class StargateAccessEvent extends StargateEvent {
      * @param deny <p>Whether the event should be denied</p>
      */
 	public StargateAccessEvent(Player player, Portal portal, boolean deny) {
-		super("StargateAccessEvent", portal);
-		
-		this.player = player;
+		super("StargateAccessEvent", portal, player);
+
 		this.deny = deny;
 	}
 
@@ -51,15 +44,17 @@ public class StargateAccessEvent extends StargateEvent {
 	}
 
     /**
-     * Gets the player involved in this stargate access event
-     * @return <p>The player involved in this event</p>
+     * Gets a handler-list containing all event handlers
+     * @return <p>A handler-list with all event handlers</p>
      */
-	public Player getPlayer() {
-		return this.player;
-	}
-
-    @Override
-    public @org.jetbrains.annotations.NotNull HandlerList getHandlers() {
+    public static HandlerList getHandlerList() {
         return handlers;
     }
+
+    @Override
+    @NotNull
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
 }