public void createSection(String sectionName, ISection parentSection, Integer sectionOrder) {
public ISection createSection(String sectionName, ISection parentSection, Integer sectionOrder) {
    public void createSection(String sectionName, ISection parentSection, Integer sectionOrder) {        if (sectionName == null || sectionOrder == null)            throw new NullPointerException();        final ISection section = new Section();        section.setName(sectionName);        section.setLastModifiedDate(Calendar.getInstance().getTime());        Integer newSectionOrder = organizeExistingSectionsOrder(parentSection, sectionOrder);        section.setSectionOrder(newSectionOrder);                section.setSite(this);        section.setSuperiorSection(parentSection);    }