Removed ui plug-in from dependency list
Removed the dependency from the UI logger
Implemented the first test case for HeadlessJavaGenerator succesfully
added new property
Added test class for HeadlessJavaGenerator
Added new package
Added todo to fix a validation error
Implemented the headless generator for java classes
Implemented tests for HeadlessJavaClassInput
Fixed a bug in the validation of the modifiers (missing return)
