JNDI and Java Beans (EJB with UML by CT Arrington)

Been reading through EJB with UML by CT Arrington and trying to get my arms around the TimeCard App that is developed as part of the tutorial. For the life of me I cannot find the java classes that implement the various bean interfaces. I know this is a stretch for the forum but I am hoping there is something obvious I am missing. One of the first things the app does is build a series of EJBs to store things like userids and passwords. Then, when you sign on the app goes out and queries the beans to see if you are a valid user. Trouble is, I can find the source that shows the bean Interfaces but not the source (or classes) that implement those Interfaces and the method calls made against them. Searched high and low. The app even makes references to what appear to be the implementation classes (e.g.,UserBean_PM_LocalHomeImpl.java) in various XML docs. But they are nowhere to be found in the downloaded app or in any of the jars. I know they have to exist somewhere because the only code I can find is interface code and I know you cannot instantiate Interfaces - they must be implemented somewhere. The app is working. Any ideas as to what I may be missing. CT Arrington has been a contributor to the forum but he may be off radar. Thanks much. Art.
(added book title to subject, hope you don't mind - Pauline)
[ November 28, 2003: Message edited by: Pauline McNamara ]

Hi Art -
This seems more appropriate to the Bunkhouse Porch, so I will move it there.