DoctrineDbal driver has some sloppy exception handling

[borb]

The Dbal driver looks like it has some sloppy exception handling. Notably:

• It tries to catch a DriverException, which has been aliased in the use statement above and likely won't work
• We catch at least one PDOException which may not be thrown by the driver at all; we can probably integration test this to prove it
• The trait PdoCommonMethods likely catches PDOExceptions which may never be thrown by Dbal

It looks very much like this hasn't received much testing, much less reproducible automated tests.

[kyam-mayden]

Looking at the first issue on this list