Eclipse Juno中的NullPointerException打开任何文件

正在安装和卸载一些插件，现在所有项目中的所有文件类型都会因日志中的此错误而中断，即使是以前有效的文件类型。有什么想法吗？除了重新安装Eclipse，还有什么办法可以修复它吗

!ENTRY org.eclipse.jface 4 2 2013-10-17 12:55:28.570
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jface".
!STACK 0
java.lang.NullPointerException
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3063)
at org.eclipse.ui.internal.WorkbenchPage.access$22(WorkbenchPage.java:2969)
at org.eclipse.ui.internal.WorkbenchPage$8.run(WorkbenchPage.java:2951)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2947)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2911)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2902)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:655)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:614)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:360)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:167)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:249)