Check if player is online

src/main/java/gent/zeus/mc13dtl/events/catalog/EndEvent.java

@@ -60,9 +60,11 @@ public class EndEvent extends Event {
   @EventHandler
   public void onEntityDeath(EntityDeathEvent event) {
     if (event.getEntityType() == EntityType.ENDER_DRAGON) {
+      if (MC13DTL.board.getPlayers(team).size() > 0) {
         eventSuccess();
       }
     }
+  }
 
   @Override
   @EventHandler