How to delete transient repository?

[bgiles]

How do I delete a transient repository?  My code is successfully 
creating and shutting down the repository, but when I try to delete the 
directory (using jakarta commons IO) I get an exception because of some 
of the data files.  This happens even if I wait 15 seconds for 
multithreaded processes in the backend to finish.

Is there a standard way to do this that is guaranteed to work?  I don't 
want to clutter our CI system with hundreds of now-unused test 
repositories created by the automatic unit tests.

(I don't want to reuse the same transient repository because I want it 
in a known state.)

Thanks,

Bear