BGFBackendException
This Exception is the major Exception, with is thrown by the
most classes of the bussines logic.
BGFControlException
This Exception is thrown by all controls of the Browsergame Framework,
if the controls are initialized with wrong values.
BGFDatabaseException
This Exception should be thrown by the DBHandler classes
BGFLoggingException
Critical problems while logging throw BGFLoggingExceptions.
These Exceptions should not be traced with the logging classes, because
they could trigger another issue;