public class TestPlugin extends JavaPlugin implements Listener {
    @Override
    public void onEnable() {
        Bukkit.getPluginManager().registerEvents(this, this);
    }


    @EventHandler
    public void onBlockBreak(BlockBreakEvent e) {
        ItemStack inHand = e.getPlayer().getInventory().getItemInMainHand();
        Bukkit.getLogger().info("Breaking block " + e.getBlock() + " with " + inHand);
        e.setCancelled(true);
        e.getBlock().breakNaturally(inHand);
    }
}