Update maven.yml

added some additional java types

Fixed values for boolean attributes (is instead of get and attributes…

… are sometimes start with 'is')

Create maven.yml

upgraded version

corrected some infos

- two bugfixes

- one more junit
- moved some files to correctly reflect package structure

Bugfix in cycle analyis

added more junit

Version with Java 1.7 compatibility

Code reformatting + clarified broken toString() message