Maybe cherry-pick:

Maybe cherry-pick:
- updated add methods to new way:
  + create a private create<Entity>Instance() which copies all fields from
    backing bean to entity class
  + invoke that method before try/catch block
  + only cover method invocations in try() block that are really necessarry to
    catch thrown exceptions, e.g. clear() will never throw an exception, unless
    you make somthing *REALLY* horrible wrong
  + events should be fired after try/catch blocks, so the updated<Entity>
    instance be declared before it (not initialized)

Signed-off-by: Roland Häder <roland@mxchange.org>