Again, if you can not hand the JavaDB since it has no GUI interface, I will advice you also download the free version of DbVisualizer
which gives you the facility to Query your DB via a GUI interface or NetBeans which is also an IDE
has the same GUI feature.
Hope this will solve your issues?
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com