FightSystem_Main/src/de/steamwar/fightsystem/FightSystem.java

@@ -74,6 +74,7 @@ public class FightSystem extends JavaPlugin {
         new TestListener();
         new NormalJoinListener();
         new RankedJoinListener();
+        new SleepListener();
         if(Core.getVersion() > 8)
             new ExtendedInventoryListener();
 

FightSystem_Main/src/de/steamwar/fightsystem/listener/SleepListener.java

@@ -0,0 +1,19 @@
+package de.steamwar.fightsystem.listener;
+
+import de.steamwar.fightsystem.states.FightState;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.player.PlayerBedEnterEvent;
+
+import java.util.EnumSet;
+
+public class SleepListener extends BasicListener{
+
+	public SleepListener() {
+		super(EnumSet.allOf(FightState.class));
+	}
+
+	@EventHandler
+	public void onSleep(PlayerBedEnterEvent e) {
+		e.setCancelled(true);
+	}	
+}