This is the unmodified source code of Bernhard Seybold's Chesspresso 0.9.2 library - http://www.chesspresso.org - repackaged as a Maven project, primarily for ease of inclusion in ChessCraft (https://github.com/desht/ChessCraft).
See also: https://github.com/jtsay362/chesspresso, a separate fork of Chesspresso.