Take a look at this: http://forums.bukkit.org/threads/mech-dropbonus-v1-5-loot-table-configuration-tool-432.6026/
Thanks for the referral Edward @Inacio, with DropBonus you can make it as complex or as simple as you want. If what you have above is all you want then you are looking at just a few lines in your configuration file and you are done.