The above code is probably caused by checked exceptions. In particular, the user wants to implement some interface or override some method, but that method wasn

The above code is probably caused by checked exceptions. In particular, the user wants to implement some interface or override some method, but that method wasn't declared to throw a particular type of exception because the people who wrote it hate extensibility and never want their software to be used in a way they didn't anticipate, so the new implementation can't throw it either.