Bukkit

package me.BukkitPVP.EnderWar.Kits;

import org.bukkit.Material;
import org.bukkit.enchantments.Enchantment;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityDamageByEntityEvent;
import org.bukkit.event.entity.EntityTargetEvent;
import org.bukkit.event.player.PlayerToggleSneakEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;

public class Battler implements Kit, Listener{

        @Override
    public void getItems(Player p){
        ItemStack i1 = new ItemStack(Material.WOOD_SWORD,1);
        ItemMeta meta = i1.getItemMeta();
        meta.setDisplayName("Wooden Sword of Doom");
        meta.addEnchant(Enchantment.FIRE_ASPECT, 2, true);
        meta.addEnchant(Enchantment.KNOCKBACK, 2, true);

        p.getInventory().setItem(0, i1);
    }

        @Override
    public String getName(){
        return "Battler";
    }

        @Override
    public Material getItem(){
        return Material.CHAINMAIL_CHESTPLATE;
    }

        @Override
    public String getDesc(){
        return "Kämpfe dich duch dies Masse mit Zaubertränken";
    }

        @Override
    public int getPrice(){
        return 40;
    }

    //Events
    @EventHandler(priority = EventPriority.NORMAL)

     public void onEntityDamage(EntityDamageByEntityEvent event) {
      if (event.getEntity() instanceof Player) {
Player Player = (Player) event.getEntity();
if(Player.isSneaking()) {
if(KitManager.isKit(this, p )){
    event.setCancelled(true);

                }
               }
    }

Wen Fehler auftreten Sorry