addUserButton.setText("Adicionar");
addUserButton.addListener(SWT.MouseUp, new Listener() {
public void handleEvent(Event arg0) {
AddUserToGroupDialog addUserToGroupDialog = new AddUserToGroupDialog(addUserButton.getShell(), userTable.getItems());
addUserToGroupDialog.open();
if(addUserToGroupDialog.getUserSelection() != null){
userChild = addUserToGroupDialog.getUserSelection();
if(!userChild.equals(""))
addItemUserTable(userChild);