\r
import org.apache.log4j.Logger;\r
import org.eclipse.core.commands.operations.IUndoContext;\r
-import org.eclipse.core.resources.IMarker;\r
-import org.eclipse.core.resources.IWorkspaceRunnable;\r
-import org.eclipse.core.resources.ResourcesPlugin;\r
import org.eclipse.core.runtime.Assert;\r
-import org.eclipse.core.runtime.CoreException;\r
-import org.eclipse.core.runtime.IProgressMonitor;\r
import org.eclipse.jface.text.Document;\r
import org.eclipse.jface.text.ILineTracker;\r
import org.eclipse.jface.text.IUndoManager;\r