@Override
 public void saveCorrespondence(DocContact docContact) {
   customerMgr.saveCorrespondence(docContact);
 }
 @Override
 public void setCustomerInfo(Customer customer) {
   customerMgr.setCustomerInfo(customer);
 }
 @Override
 public Customer getCustomerInfo(int cusID) {
   return customerMgr.getCustomerInfo(cusID);
 }