startField.setImmediate(true);
DateField endField = new DateField("End");
endField.setImmediate(true);
endField.setResolution(Resolution.MINUTE);
formLayout.addComponent(captionField);
formLayout.addComponent(descriptionField);
formLayout.addComponent(startField);
formLayout.addComponent(endField);
fieldGroup.bind(captionField, ContainerEventProvider.CAPTION_PROPERTY);