Index: Eclipse UI/org/eclipse/ui/actions/AddBookmarkAction.java
===================================================================
RCS file: /home/eclipse/org.eclipse.ui/Eclipse UI/org/eclipse/ui/actions/AddBookmarkAction.java,v
retrieving revision 1.3
diff -u -r1.3 AddBookmarkAction.java
--- Eclipse UI/org/eclipse/ui/actions/AddBookmarkAction.java	3 Oct 2001 21:20:46 -0000	1.3
+++ Eclipse UI/org/eclipse/ui/actions/AddBookmarkAction.java	16 Jan 2002 22:08:36 -0000
@@ -6,6 +6,7 @@
  */
 import org.eclipse.core.resources.*;
 import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IAdaptable;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.help.WorkbenchHelp;
@@ -15,6 +16,7 @@
 import org.eclipse.ui.internal.misc.Assert;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.swt.widgets.Shell;
+
 import java.util.Iterator;
 
 /**
@@ -58,8 +60,12 @@
 	IStructuredSelection selection = getStructuredSelection();
 	for (Iterator enum = selection.iterator(); enum.hasNext();) {
 		Object o = enum.next();
-		if (o instanceof IFile)
-			createMarker((IFile) o, markerType);
+		if (o instanceof IAdaptable) {
+			// don't rely on selection being of type IFile. fixes bug 2296
+			Object resource= ((IAdaptable)o).getAdapter(IResource.class);
+			if (resource instanceof IFile)
+				createMarker((IFile)resource, markerType);
+		}
 	}
 }
 /**