Bank is class "Bank"
           Customer is class "Customer"
           Debitcard is class "Debitcard"
           Transaction is class "Transaction"
           Account is class "Account"
           Atminfo is class "Atminfo"
           Currentaccount is class "Currentaccount"
           Savingaccount is class "Savingaccount"
           Withdrawltransaction is class "Withdrawltransaction"
           Querytransaction is class "Querytransaction"
           Transfertransaction is class "Transfertransaction"
           Pinvalidationtransaction is class "Pinvalidationtransaction".