So basically within the Employee class file (under the model directory) I have the below code:

@Transient
public void addAccount(int account_id)
{
    if (!isAccountExists(account_id)) {
        AccountEmployee ae = new AccountEmployee();
        ae.setAccountId(account_id);
        ae.setEmployeeId(this.id);
    }
}

     @Transient
     private Boolean isAccountExists(int account_id)
     {
          Iterator<AccountEmployee> iter = this.getAccountEmployees().iterator();
          while (iter.hasNext()) {
               if (iter.next().getAccountId()==account_id) {
                    return true;
               }
          }
          return false;
     }

Although the new AccountEmployee is created, it is not save to the database. How do I make the Employee Entity actually update the AccountEmployee entities too?