I am happy to announce the first version of Doclipse, an Eclipse plug-in to help you write Java source files with Javadoc tags, either for documentation purposes or to be processed by a tool such as EJBGen or XDoclet.

Once you have installed Doclipse, you can add your own definition files for
JavaDoc tags and they become available immediately in the editor.

Check out the Doclipse home page for
more details.