NPCPlayerEventListener interact_listener = new NPCPlayerEventListener();
        NPCEntityListener entity_listener = new NPCEntityListener();
        St0rm.getInstance().getServer().getPluginManager().registerEvent(Type.PLAYER_INTERACT_ENTITY, interact_listener, Priority.High, St0rm.getInstance());
        St0rm.getInstance().getServer().getPluginManager().registerEvent(Type.ENTITY_TARGET, entity_listener, Priority.High, St0rm.getInstance());
        St0rm.getInstance().getServer().getPluginManager().registerEvent(Type.ENTITY_DAMAGE, entity_listener, Priority.High, St0rm.getInstance());


public class NPCEntityListener extends EntityListener {

    public void onEntityTarget(EntityTargetEvent event)
    {
        System.out.println("A");
        NPC npc = NPCManager.getNPC(event.getEntity());
        if (npc == null)
            return;
        System.out.println("B");
        if (npc instanceof StationaryNPC)
        {
            System.out.println("C");
            event.setCancelled(true);
        }
    }
    public void onEntityDamage(EntityDamageEvent event)
    {
        NPC npc = NPCManager.getNPC(event.getEntity());
        if (npc == null)
            return;
        if (npc instanceof StationaryNPC)
        {
            event.setCancelled(true);
        }
    }
}