Modified Files:
Added public Element store() methods to store object in jdom - Element
src/java/de/fhworms/ztt/ox/core/Answer.java
src/java/de/fhworms/ztt/ox/core/Student.java
src_test/java/unit/de/fhworms/ztt/ox/core/AnswerTest.java
src_test/java/unit/de/fhworms/ztt/ox/core/StudentTest.java
