This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I think you don't have the sources do you? If you don't have them take a look to the place where you downloaded the jar, you should have the source-code there in another jar, I guess. I haven't found to much information for this library.