Stupp is a small Java library for mocking-up the persistence of interface-based data models in unit tests. Here are some quick pointers:
Stupp is released under the Apache 2.0 licence. This gives it an extremely wide scope for use in closed source, commercially licenced software and other open source projects. Please read the licence for full details.
No real documentation yet, but I have produced a diagram indicating the relationships between the main Stupp package classes.