public final class TestBlockBreak extends JavaPlugin implements Listener {

    @Override
    public void onEnable(){
         this.getServer().getPluginManager().registerEvents(this, this);
     }

    @Override
    public void onDisable() {}

    @EventHandler
    public void onBreak(BlockBreakEvent e) {
        e.setDropItems(false); // The code in question here
        Player p = e.getPlayer();
        int broken = 0;
        for (Material mat : Material.values()) {             
            broken += p.getStatistic(Statistic.MINE_BLOCK, mat);
         }

        Bukkit.broadcastMessage("Blocks broken: " + broken);
    }
}