diff --git a/src/com/massivecraft/massivecore/collections/ExceptionSet.java b/src/com/massivecraft/massivecore/collections/ExceptionSet.java
new file mode 100644
index 00000000..87c7583f
--- /dev/null
+++ b/src/com/massivecraft/massivecore/collections/ExceptionSet.java
@@ -0,0 +1,51 @@
+package com.massivecraft.massivecore.collections;
+
+import com.massivecraft.massivecore.CaseInsensitiveComparator;
+
+public class ExceptionSet<T>
+{
+	// -------------------------------------------- //
+	// FIELDS
+	// -------------------------------------------- //
+	
+	public boolean standard = true;
+	
+	public MassiveTreeSet<String, CaseInsensitiveComparator> exceptions = new MassiveTreeSet<String, CaseInsensitiveComparator>(CaseInsensitiveComparator.get());
+	
+	// -------------------------------------------- //
+	// CONSTRUCT
+	// -------------------------------------------- //
+	
+	public ExceptionSet()
+	{
+		
+	}
+
+	public ExceptionSet(boolean standard)
+	{
+		this.standard = standard;
+	}
+	
+	// -------------------------------------------- //
+	// CONTAINS
+	// -------------------------------------------- //
+	
+	public boolean contains(String item)
+	{
+		if (this.exceptions.contains(item)) return ! this.standard;
+		return this.standard;
+	}
+
+	public boolean contains(T item)
+	{
+		if (item == null) return ! this.standard;
+		
+		return this.contains(convert(item));
+	}
+	
+	public String convert(T item)
+	{
+		return item.toString();
+	}
+	
+}
diff --git a/src/com/massivecraft/massivecore/collections/WorldExceptionSet.java b/src/com/massivecraft/massivecore/collections/WorldExceptionSet.java
index 7f70e1ef..1b9380b8 100644
--- a/src/com/massivecraft/massivecore/collections/WorldExceptionSet.java
+++ b/src/com/massivecraft/massivecore/collections/WorldExceptionSet.java
@@ -4,19 +4,10 @@ import org.bukkit.Location;
 import org.bukkit.World;
 import org.bukkit.entity.Entity;
 
-import com.massivecraft.massivecore.CaseInsensitiveComparator;
 import com.massivecraft.massivecore.ps.PS;
 
-public class WorldExceptionSet
+public class WorldExceptionSet extends ExceptionSet<World>
 {
-	// -------------------------------------------- //
-	// FIELDS
-	// -------------------------------------------- //
-	
-	public boolean standard = true;
-	
-	public MassiveTreeSet<String, CaseInsensitiveComparator> exceptions = new MassiveTreeSet<String, CaseInsensitiveComparator>(CaseInsensitiveComparator.get());
-	
 	// -------------------------------------------- //
 	// CONSTRUCT
 	// -------------------------------------------- //
@@ -28,17 +19,17 @@ public class WorldExceptionSet
 	
 	public WorldExceptionSet(boolean standard)
 	{
-		this.standard = standard;
+		super(standard);
 	}
 	
 	// -------------------------------------------- //
 	// CONTAINS
 	// -------------------------------------------- //
 	
-	public boolean contains(String world)
+	@Override
+	public String convert(World world)
 	{
-		if (this.exceptions.contains(world)) return !this.standard;
-		return this.standard;
+		return world.getName();
 	}
 	
 	public boolean contains(PS ps)
@@ -46,11 +37,6 @@ public class WorldExceptionSet
 		return this.contains(ps.getWorld());
 	}
 	
-	public boolean contains(World world)
-	{
-		return this.contains(world.getName());
-	}
-	
 	public boolean contains(Location loc)
 	{
 		return this.contains(loc.getWorld());