the sources for J2MeSupport can be found at the WiKi page:
The sources contain a small framework for creating dialogs by simple declaration of the options in an option class. The framework allowes to easily add new options to your plugin settings, edit them and use appply/cancel actions. The options can be saved to project workspace file as well as to an external properties file.
If anyone would be interested I'd love to extend it further, but I need some help, at least at discussion level. Possible direction of extension could be, useing XML for plugin options declaration, and generate standard option dialogs.