ArmorListener.java

public class ArmorListener implements Listener
{

	private Material[] armor = { Material.IRON_HELMET, Material.IRON_CHESTPLATE, Material.IRON_LEGGINGS, Material.IRON_BOOTS, Material.GOLD_HELMET, Material.GOLD_CHESTPLATE, Material.GOLD_LEGGINGS, Material.GOLD_BOOTS, Material.DIAMOND_HELMET, Material.DIAMOND_CHESTPLATE, Material.DIAMOND_LEGGINGS, Material.DIAMOND_BOOTS, Material.CHAINMAIL_HELMET, Material.CHAINMAIL_CHESTPLATE, Material.CHAINMAIL_LEGGINGS, Material.CHAINMAIL_BOOTS };
	
	@EventHandler
	public void onInventoryClick(InventoryClickEvent e)
	{
		Player player = (Player) e.getWhoClicked();
		
		for(int i = 0; i < armor.length; i++)
		{
			if(e.getCurrentItem().getType().equals(armor[i]) && e.getSlotType() == SlotType.ARMOR)
			{
				PlayerArmorChangeEvent event = new PlayerArmorChangeEvent(player, armor[i], EnumArmorMethods.INVENTORY_CLICK_EVENT);
				Bukkit.getServer().getPluginManager().callEvent(event);
			}
		}
	}
	
	@EventHandler
	public void onPlayerInteract(PlayerInteractEvent e)
	{
		Player player = e.getPlayer();
		
		if(e.getAction() == Action.RIGHT_CLICK_AIR || e.getAction() == Action.RIGHT_CLICK_BLOCK)
		{
			for(int i = 0; i < armor.length; i++)
			{
				if(player.getItemInHand().getType().equals(armor[i]))
				{
					PlayerArmorChangeEvent event = new PlayerArmorChangeEvent(player, armor[i], EnumArmorMethods.INVENTORY_INTERACT_EVENT);
					Bukkit.getServer().getPluginManager().callEvent(event);
				}
			}
		}
	}
	
	@EventHandler
	public void onBlockDispense(BlockDispenseEvent e)
	{
		for(int i = 0; i < armor.length; i++)
		{
			if(e.getItem().getType().equals(armor[i]))
			{
				World world = e.getBlock().getWorld();
				
				for(Entity ent : world.getEntities())
				{
					if(ent.getLocation().distance(e.getBlock().getLocation()) <= 2 && ent instanceof Player)
					{
						Player player = (Player) ent;
						
						PlayerArmorChangeEvent event = new PlayerArmorChangeEvent(player, armor[i], EnumArmorMethods.DISPENSE_EVENT);
						Bukkit.getServer().getPluginManager().callEvent(event);
					}
				}
			}
		}
	}
	
}

EnumArmorMethods.java

public enum EnumArmorMethods
{
	INVENTORY_CLICK_EVENT("InventoryClickEvent"),
	INVENTORY_INTERACT_EVENT("PlayerInteractEvent"),
	DISPENSE_EVENT("BlockDispenseEvent");
	
	private String eventName;
	
	EnumArmorMethods(String eventName)
	{
		this.eventName = eventName;
	}
	
	public String getEventName()
	{
		return eventName;
	}
}

PlayerArmorChangeEvent.java

public class PlayerArmorChangeEvent extends Event
{
    private static final HandlerList handlers = new HandlerList();
    
    private Player player;
    private Material armorType;
    private EnumArmorMethods method;
    
    public PlayerArmorChangeEvent(Player player, Material armorType, EnumArmorMethods method)
    {
        this.player = player;
        this.armorType = armorType;
        this.method = method;
    }
 
    public Player getPlayer()
    {
        return player;
    }
 
    public Material getArmorType()
    {
    	return armorType;
    }
    
    public EnumArmorMethods getMethod()
    {
    	return method;
    }
    
    public HandlerList getHandlers()
    {
        return handlers;
    }
 
    public static HandlerList getHandlerList()
    {
        return handlers;
    }
}