public ActionForward addPhdProgramPeriod(ActionMapping mapping, ActionForm form, HttpServletRequest request,
HttpServletResponse response) {
try {
PhdProgram phdProgram = getDomainObject(request, "phdProgramId");
PhdProgramContextPeriodBean bean = getRenderedObject("phdProgramContextPeriodBean");
phdProgram.create(bean);
} catch (PhdDomainOperationException e) {
addErrorMessage(request, e.getKey(), e.getArgs());
return addPhdProgramPeriodInvalid(mapping, form, request, response);
}