I am writing a real estate management solution. I am using Hibernate,
Struts and the Spring framework. 

The application is a work in progress but the Hibernate persistance part
is quite comprehensive. 

It demonstrates use of XDoclet tags and inheritance. 

I am making it open source because I could not find any examples of this 
when I started the project. 

http://revoltingdigits.com/code/thejestateproject.php

This is not a finished product but what unit tests are there work 100%