public class InventoryClickListener implements Listener {
	
	@EventHandler
	public void handleInventoryClick(InventoryClickEvent e) {
		e.getCurrentItem().getType(); //NullPointerException
	}
	
	@EventHandler
	public void handlePlayerJoin(PlayerJoinEvent e) {
		Inventory inv = Bukkit.createInventory(e.getPlayer(), InventoryType.CHEST); //Other types are working too
		e.getPlayer().openInventory(inv);
	}}