This file was repackaged because:
1. it was shipped as a zip
2. it contained compiled class files which should be
   removed
3. it contained compiled external libraries (jar files)
   which should be removed

For repackaging instructions see the get-orig-source 
target in the debian/rules file

Note for version 12.1:
The authors forgot to include portions of the source code
(BaseletElement) and provided me with a link where to fetch
those. The files can be downloaded from:
 svn export --force  "http://umlet.googlecode.com/svn/tags/2013-08-29 UMLet v12.1/BaseletElements/src"