import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
-import org.eclipse.linuxtools.tmf.event.TmfTimestamp;
+import org.eclipse.linuxtools.tmf.core.event.TmfTimestamp;
import org.eclipse.linuxtools.tmf.ui.views.uml2sd.SDWidget;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;