import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.StructuredSelection;
-import org.eclipse.linuxtools.tmf.event.TmfTimestamp;
+import org.eclipse.linuxtools.tmf.core.event.TmfTimestamp;
import org.eclipse.linuxtools.tmf.ui.ITmfImageConstants;
import org.eclipse.linuxtools.tmf.ui.TmfUiPlugin;
import org.eclipse.linuxtools.tmf.ui.views.uml2sd.core.BaseMessage;