plugin

Make the main class:

public final class LolnetItemFrameFix extends JavaPlugin
{
    String prefix = ChatColor.GREEN + "[" + ChatColor.AQUA + "lolnetItemFrameFix" + ChatColor.GREEN + "]";
    String player;

    @Override
    public void onEnable()
    {
        Bukkit.getPluginManager().registerEvents(new ItemFrameRightClickListener, this);
        getLogger().info("lolnetItemFrameFix Enabled. Have a nice day.");
    }
}


and the listener class:


public class ItemFrameRightClickListener implements Listener
{
    @EventHandler
    public void onItemFrameRightClick(EntityDamageByEntityEvent event)
    {
        if(event.getDamager().getType().equals(EntityType.PLAYER))
        {
            Player damager = (Player)event.getDamager();

            if(event.getEntity().getType() == EntityType.ITEM_FRAME)
            {
                damager.sendMessage(prefix + "You may not steal or flip an item in an item frame. Naughty boy. (/Girl)");
                out.println(prefix + "I stopped " + damager.getName() + " From interacting maliciously with an item frame.");
                event.setCancelled(true);
            }
        }
    }
}