Supply the Plugin upon registration of a MassiveCommand.

src/main/java/com/massivecraft/massivecore/MassiveCore.java

@@ -193,19 +193,19 @@ public class MassiveCore extends MassivePlugin
 		
 		// Register commands
 		this.outerCmdMassiveCore = new CmdMassiveCore() { public List<String> getAliases() { return MassiveCoreMConf.get().aliasesOuterMassiveCore; } };
-		this.outerCmdMassiveCore.register();
+		this.outerCmdMassiveCore.register(this);
 		
 		this.outerCmdMassiveCoreUsys = new CmdMassiveCoreUsys() { public List<String> getAliases() { return MassiveCoreMConf.get().aliasesOuterMassiveCoreUsys; } };
-		this.outerCmdMassiveCoreUsys.register();
+		this.outerCmdMassiveCoreUsys.register(this);
 		
 		this.outerCmdMassiveCoreStore = new CmdMassiveCoreStore() { public List<String> getAliases() { return MassiveCoreMConf.get().aliasesOuterMassiveCoreStore; } };
-		this.outerCmdMassiveCoreStore.register();
+		this.outerCmdMassiveCoreStore.register(this);
 		
 		this.outerCmdMassiveCoreBuffer = new CmdMassiveCoreBuffer() { public List<String> getAliases() { return MassiveCoreMConf.get().aliasesOuterMassiveCoreBuffer; } };
-		this.outerCmdMassiveCoreBuffer.register();
+		this.outerCmdMassiveCoreBuffer.register(this);
 		
 		this.outerCmdMassiveCoreCmdurl = new CmdMassiveCoreCmdurl() { public List<String> getAliases() { return MassiveCoreMConf.get().aliasesOuterMassiveCoreCmdurl; } };
-		this.outerCmdMassiveCoreCmdurl.register();
+		this.outerCmdMassiveCoreCmdurl.register(this);
 		
 		// Integration
 		this.integrate(

src/main/java/com/massivecraft/massivecore/MassivePlugin.java

@@ -10,6 +10,7 @@ import org.bukkit.command.ConsoleCommandSender;
 import org.bukkit.event.Listener;
 import org.bukkit.plugin.java.JavaPlugin;
 
+import com.massivecraft.massivecore.cmd.MassiveCommand;
 import com.massivecraft.massivecore.integration.IntegrationGlue;
 import com.massivecraft.massivecore.integration.Integration;
 import com.massivecraft.massivecore.store.Coll;
@@ -77,7 +78,10 @@ public abstract class MassivePlugin extends JavaPlugin implements Listener
 	@Override
 	public void onDisable()
 	{
-		// Collection shutdowns.
+		// Commands
+		MassiveCommand.unregister(this);
+		
+		// Collections
 		for (Coll<?> coll : Coll.getInstances())
 		{
 			if (coll.getPlugin() != this) continue;

src/main/java/com/massivecraft/massivecore/cmd/MassiveCommand.java

@@ -5,8 +5,10 @@ import java.util.Map.Entry;
 
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.bukkit.plugin.Plugin;
 
 import com.massivecraft.massivecore.Lang;
+import com.massivecraft.massivecore.MassiveCore;
 import com.massivecraft.massivecore.cmd.arg.ArgReader;
 import com.massivecraft.massivecore.cmd.arg.ArgResult;
 import com.massivecraft.massivecore.cmd.req.Req;
@@ -33,10 +35,56 @@ public class MassiveCommand
 	// This task unregisters /all/ registered MCommands and then register them all again.
 	// When registering again we use the fresh and current aliases.
 	
-	private static transient Set<MassiveCommand> registeredCommands = new LinkedHashSet<MassiveCommand>();
-	public static Set<MassiveCommand> getRegisteredCommands() { return registeredCommands; }
-	public void register() { getRegisteredCommands().add(this); }
-	public void unregister() { getRegisteredCommands().remove(this); }
+	private static transient Map<MassiveCommand, Plugin> registry = new LinkedHashMap<MassiveCommand, Plugin>();
+	
+	public static Set<MassiveCommand> getRegisteredCommands()
+	{
+		return registry.keySet();
+	}
+	
+	public static Map<MassiveCommand, Plugin> getRegistry()
+	{
+		return registry;
+	}
+	
+	public static void unregister(Plugin plugin)
+	{
+		Iterator<Entry<MassiveCommand, Plugin>> iter = registry.entrySet().iterator();
+		while (iter.hasNext())
+		{
+			Entry<MassiveCommand, Plugin> entry = iter.next();
+			if (plugin.equals(entry.getValue()))
+			{
+				iter.remove();
+			}
+		}
+	}
+	
+	@Deprecated
+	public void register()
+	{
+		this.register(MassiveCore.get());
+	}
+	
+	public Plugin register(Plugin plugin)
+	{
+		return registry.put(this, plugin);
+	}
+	
+	public void unregister()
+	{
+		registry.remove(this);
+	}
+	
+	public boolean isRegistered()
+	{
+		return registry.containsKey(this);
+	}
+	
+	public Plugin getRegisteredPlugin()
+	{
+		return registry.get(this);
+	}
 	
 	// -------------------------------------------- //
 	// COMMAND BEHAVIOR