Hibernate provide rich configuration facilities which help you configure Hibernate dynamically in term of adding mapping data or other configuration artifacts that usually stores in hibernate.cfg.xml or equal properties files.
JUNG — the Java Universal Network/Graph Framework--is a software library that provides a common and extendible language for the modeling, analysis, and visualization of data that can be represented as a graph or network. It is written in Java,
M. Halvey, and M. Keane. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 1313--1314. New York, NY, USA, ACM Press, (2007)