@Override
public void componentSelected(ButtonEvent ce)
{
if (getNameText().getValue() != null && !getNameText().getValue().isEmpty())
{
SystemEntity entity = new SystemEntity(getNameText().getValue(), getPanel().getEquations(),
getPanel().getRangeStart(), getPanel().getRangeStop(), getPanel().getStep());
persistentService.persist(entity, new AsyncCallback<Void>()
{
@Override