Delete unneeded exceptions

Delete unneeded exceptions
WikiService Javadoc and reorganization
Finish WikiService documentation

Finish WikiService documentation
Improve javadoc of ProfileService

Improve javadoc of ProfileService
Adding JavaDoc details

Adding JavaDoc details
Javadoc on ForumService
Merge pull request #1462 from CarlosManias/java-refactor-reorganize-and-javadoc

Improved javadoc