try { ... } catch (Exception e) { throw e; } That does nothing except add visual noise. It's like a magic incantation to make the errors go away (it doesn't a

try { ... } catch (Exception e) { throw e; } That does nothing except add visual noise. It's like a magic incantation to make the errors go away (it doesn't actually), probably by someone used to Visual Basic's "ON ERROR RESUME NEXT" or some such.