This plugin generates xdoc and html documentation for the QALab tool. The reports are built from the statistics from Checkstyle, PMD, FindBugs and Simian.
The charts are generated via jFreeChart and the movers report shows the changes for a given time window.
The plugin is designed in such a way that you may not need to configure anything for it to be working with checkstyle & co, provided that the raw reports are in the target directory (default for those tools).