This is a feature of JBuilder Enterprise.
The EJB Designer is a true Two-Way ToolTM that allows you to design your EJB 2.0 components visually as JBuilder generates the code from your design. You can make changes to your design either through the EJB Designer, or by editing the generated source code directly. Your source code and your design remain synchronized. As you work with the EJB Designer, your deployment descriptors are being created for you, preparing your bean for deployment to your target application server. When you are done developing your enterprise beans, JBuilder has wizards and tools to help you deploy them to your target application server.
If you're not ready for EJB 2.0 yet, you can also use JBuilder to create and deploy EJB 1.x components.
For more information, see:
Enterprise JavaBeans Developer's Guide: An introduction to EJB development
Enterprise JavaBeans Developer's Guide: Creating EJB 2.0 components with JBuilder
Enterprise JavaBeans Developer's Guide: Creating EJB 1.x components with JBuilder