Put items in chest!

Hey i found a methode to put items in chests
P.S This is a Code from a Test plugin xD

Code:

@EventHandler
public void onTest(BlockPlaceEvent e){
Player p = e.getPlayer();
Block block = e.getBlock();

[pre][code]    if(block.getId() == Block.CHEST){
        double x = e.getBlock().getX();
        double y = e.getBlock().getY();
        double z = e.getBlock().getZ();
        List<String> arenen = cfg.getStringList("Blocks");
        arenen.add(x + "," + y + "," + z);
        cfg.set("Blocks", arenen);
        cfg.save();
        p.sendMessage("Erlfogreich gesetzt!");
    }

}

public void refillChests(Level level){
    if(level instanceof Level){
        List<String> list = cfg.getStringList("Blocks");
        for(String sign : list){
            String[] infos = sign.split(",");
            double x = Double.valueOf(infos[0]);
            double y = Double.valueOf(infos[1]);
            double z = Double.valueOf(infos[2]);

            if(level.getBlockEntity(new Vector3(x, y, z)) instanceof BlockEntityChest){
                BlockEntityChest chest = (BlockEntityChest) level.getBlockEntity(new Vector3(x, y, z));
                addStuff(chest);
            }

        }
    }

}

public void addStuff(BlockEntityChest chest){
    ChestInventory inv = null;
    if(chest.isPaired()){
        inv = (ChestInventory) chest.getInventory();
    }else{
        inv = (ChestInventory) chest.getRealInventory();
    }
    Item item = Item.get(Item.IRON_AXE);

    inv.addItem(item);

}

[/code][/pre]