This is a feature of JBuilder Enterprise.
The Empty EJB Group wizard creates an EJB group that contains minimal deployment descriptors with no enterprise bean defined. You then add to the deployment descriptors as you create enterprise beans using JBuilder's EJB wizards. An EJB group is a logical grouping of one or more beans that will be deployed in a single JAR file. When you finish the wizard, the new empty EJB group appears in the project pane with an .ejbgrp extension.
To display the wizard, choose File|New, click the Enterprise tab in the object gallery, and double-click the Empty EJB Group icon.