This update allows you to read/write nbt files. It can be used as an alternative to saveing data in yml format.
Example:
Code (Text):
NBTFile file = new NBTFile(new File(getDataFolder(), "test.nbt"));
file.addCompound("testcomp");
file.setLong("time", System.currentTimeMillis());
file.setString("test", "test");
file.save();