java.lang.NullPointerException: This exception has no message.

java.lang.NullPointerException: 	at net.sf.eclipsecs.ui.quickfixes.CheckstyleMarkerResolutionGenerator.getInstantiatedQuickfixes(CheckstyleMarkerResolutionGenerator.java:99)	at net.sf.eclipsecs.ui.quickfixes.CheckstyleMarkerResolutionGenerator.getResolutions(CheckstyleMarkerResolutionGenerator.java:54)	at org.eclipse.ui.internal.ide.registry.MarkerHelpRegistry.getResolutions(MarkerHelpRegistry.java:253)	at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionProcessor.collectMarkerProposals(JavaCorrectionProcessor.java:314)	at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionProcessor.collectProposals(JavaCorrectionProcessor.java:273)	at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionProcessor.computeQuickAssistProposals(JavaCorrectionProcessor.java:242)	at org.eclipse.jface.text.quickassist.QuickAssistAssistant$ContentAssistProcessor.computeCompletionProposals(QuickAssistAssistant.java:75)	at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:1830)	at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:556)	at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$16(CompletionProposalPopup.java:553)	at org.eclipse.jface.text.contentassist.CompletionProposalPopup$2.run(CompletionProposalPopup.java:488)	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)	at org.eclipse.jface.text.contentassist.CompletionProposalPopup.showProposals(CompletionProposalPopup.java:482)	at org.eclipse.jface.text.contentassist.ContentAssistant.showPossibleCompletions(ContentAssistant.java:1656)	at org.eclipse.jface.text.quickassist.QuickAssistAssistant.showPossibleQuickAssists(QuickAssistAssistant.java:128)	at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionAssistant.showPossibleQuickAssists(JavaCorrectionAssistant.java:193)	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$AdaptedSourceViewer.doOperation(CompilationUnitEditor.java:195)	at org.eclipse.ui.texteditor.TextOperationAction$1.run(TextOperationAction.java:128)	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)	at org.eclipse.ui.texteditor.TextOperationAction.run(TextOperationAction.java:126)	at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)	at org.eclipse.ui.commands.ActionHandler.execute(ActionHandler.java:185)	at org.eclipse.ui.internal.handlers.LegacyHandlerWrapper.execute(LegacyHandlerWrapper.java:109)	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)	at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:468)	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:786)	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:885)	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:567)	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:508)	at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:123)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1262)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1052)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1104)	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1100)	at org.eclipse.swt.widgets.Widget.wmKeyDown(Widget.java:1809)	at org.eclipse.swt.widgets.Control.WM_KEYDOWN(Control.java:4892)	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4560)	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4972)	at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)	at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2531)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3752)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)	at org.eclipse.equinox.launcher.Main.run(Main.java:1410)	at org.eclipse.equinox.launcher.Main.main(Main.java:1386)