Maybe try looking in this direction:
- May your project be maven project
- Use Jenkins (you already do)
- Use Sonar
Sonar:
- More about: http://www.sonarsource.org/manage-code-coverage-by-unit-tests-with-sonar/
- Download from: http://sonar-pkg.sourceforge.net/
There are lot of tutorials how to use Jenkins+Sonar so I guess you will not have much trouble. Sonar is really powerful tool, one of the best I've seen so far. And there is a plugin for Jenkins (but it can be avoided with certain profile in your maven project's pom.xml file).