A great utility for localization is Attesoro, which can help you build your resource bundles.
Eclipse Resource Bundle Editor Plugin: http://sourceforge.net/projects/eclipse-rbe/ is another FANTASTIC editor for eclipse.
IBM's Resource Bundle Manager which is awesome too.
Below you can see some screenshots of the eclipse resource bundle editor plugin. I really recommend this tool also
INFO Make sure your files are all utf-8 encoding. It's also good i18n practice to liberally use cfprocessingdirective