Помогите с реализацией...

import events.Helper;
import java.util.ArrayList;
import xxxx.gameserver.model.L2Spawn;
import xxxx.extensions.scripts.Functions;

    private static ArrayList<L2Spawn> _spawns         = new ArrayList<L2Spawn>();

   public void spawnEventManagers(){
        
        Helper.SpawnNPCs(REGISTER, LOCR, _spawns);//(npcId, int[][](x,y,z,heading), _spawns)
                executeTask("events.Base.Base", "despawneventmanagers", new Object[0], 180000);//3 минуты

    }
    
    public void despawneventmanagers(){
        
        Helper.deSpawnNPCs(_spawns);
    }

ThreadPoolManager.getInstance().scheduleGeneral(new unSummon(activeChar, petSummon), 180000);

package items;
import java.util.logging.Logger;
import net.sf.l2j.gameserver.datatables.SkillTable;
import net.sf.l2j.gameserver.handler.IItemHandler;
import net.sf.l2j.gameserver.handler.ItemHandler;
import net.sf.l2j.gameserver.model.L2ItemInstance;
import net.sf.l2j.gameserver.model.L2Skill;
import net.sf.l2j.gameserver.model.actor.instance.L2PcInstance;
import net.sf.l2j.gameserver.model.actor.instance.L2PetInstance;
import net.sf.l2j.gameserver.model.actor.instance.L2PlayableInstance;
import net.sf.l2j.gameserver.model.actor.instance.L2NpcInstance;
import net.sf.l2j.gameserver.network.SystemMessageId;
import net.sf.l2j.gameserver.serverpackets.ActionFailed;
import net.sf.l2j.gameserver.serverpackets.MagicSkillUse;
import net.sf.l2j.gameserver.serverpackets.SystemMessage;
import net.sf.l2j.gameserver.templates.L2NpcTemplate;
import net.sf.l2j.gameserver.ThreadPoolManager;
import net.sf.l2j.gameserver.datatables.NpcTable;
import net.sf.l2j.gameserver.model.L2Spawn;
import net.sf.l2j.gameserver.serverpackets.InventoryUpdate;
import net.sf.l2j.gameserver.model.L2ItemInstance;
import net.sf.l2j.util.Rnd;


public class eventtp implements IItemHandler
{
    private static final int[] ITEM_IDS = { 11006, 11007};
    
    public eventtp()
    {
        ItemHandler.getInstance().registerItemHandler(this);
    }


    public void useItem(L2PlayableInstance playable, L2ItemInstance item)
       {
        L2PcInstance activeChar;
        if (playable instanceof L2PcInstance)
            activeChar = (L2PcInstance)playable;
        else if (playable instanceof L2PetInstance)
            activeChar = ((L2PetInstance)playable).getOwner();
        else
            return;

        if (activeChar.isAllSkillsDisabled())
        {
            activeChar.sendPacket(ActionFailed.STATIC_PACKET);
            return;
        }

        int itemId = item.getItemId();

           if (itemId >= 11006 && itemId <= 11007)
           {
               if (!playable.destroyItem("Consume", item.getObjectId(), 1, null, false))
                return;
               switch(itemId)
            {
                case 11006: // Spawn The Buffer
                     int x = activeChar.getX();
                     int y = activeChar.getY();
                     int z = activeChar.getZ();
                     int num = 1;
                     int time = 3; //minutes to npc despawn
                     addMySpawn(50000,x,y,z,30000,true,time*60000);
                     L2ItemInstance refreshitem = activeChar.getInventory().addItem("Refresh", itemId, num, activeChar, null);
                     InventoryUpdate iu = new InventoryUpdate();
                     iu.addItem(refreshitem);
                     activeChar.sendPacket(iu);
                    break;
                case 11007: // Event Teleport
                    activeChar.teleToLocation(9745, 15606, -4574, true);
                    break;                
                default:
                    break;
            }
               return;
           }

        // for the rest, there are no extra conditions
        if (!playable.destroyItem("Consume", item.getObjectId(), 1, null, false))
            return;
       }
    
    public L2NpcInstance addMySpawn(int npcId, int x, int y, int z,int heading, boolean randomOffset, int despawnDelay)
    {
        L2NpcInstance result = null;
        try
        {
            L2NpcTemplate template = NpcTable.getInstance().getTemplate(npcId);
            if (template != null)
            {
                if ((x == 0) && (y == 0))
                {
                    return null;
                }
                if (randomOffset)
                {
                    int offset;
                    offset = Rnd.get(2);
                    if (offset == 0) {offset = -1;}
                    offset *= Rnd.get(30, 60);
                    x += offset;

                    offset = Rnd.get(2);
                    if (offset == 0) {offset = -1;}
                    offset *= Rnd.get(30, 60);
                    y += offset;
                }      
                L2Spawn spawn = new L2Spawn(template);
                spawn.setHeading(heading);
                spawn.setLocx(x);
                spawn.setLocy(y);
                spawn.setLocz(z+20);
                spawn.stopRespawn();
                result = spawn.spawnOne();

                if (despawnDelay > 0)
                    ThreadPoolManager.getInstance().scheduleGeneral(new DeSpawnScheduleTimerTask(result), despawnDelay);
                
                return result;
            }
        }
        catch (Exception e1)
        {
            _log.warning("Could not spawn Npc " + npcId);
        }
          
        return null;
    }
    
    public class DeSpawnScheduleTimerTask implements Runnable
    {
        L2NpcInstance _npc = null;
        public DeSpawnScheduleTimerTask(L2NpcInstance npc)
        {
            _npc = npc;
        }
        
        public void run()
        {
           _npc.onDecay();
        }
    }
    
    protected static final Logger _log = Logger.getLogger(eventtp.class.getName());
    
    public int[] getItemIds()
    {
        return ITEM_IDS;
    }

}