public void onDamage(EntityDamageByEntityEvent e) {
            if(e.getEntity() instanceof EnderDragon && e.getDamager() instanceof Player) {
            	String name = ((Player) e.getDamager()).getName();
            	double damage = fighters.get(name);
            	fighters.put(name, damage+e.getDamage());
            } else {
				return;
            }

        }