Modified:
SavingsDAO.java
 - all function throws SQLException back to caller, SavingsAcc_Control
 - SavingsAcc_Control handles exception and return the error message

SavingsAcc_Control
 - handles exception

Main.java
 - corrected error message

Known Issues:
 - From previous commit, bean's timeout is not handled at server.

To Add:
 - Function to view all customers.