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java.lang.NullPointerException: 	at org.springframework.ide.eclipse.beans.ui.properties.ConfigFilesTab.handleAddButtonPressed(ConfigFilesTab.java:486)	at org.springframework.ide.eclipse.beans.ui.properties.ConfigFilesTab.handleButtonPressed(ConfigFilesTab.java:382)	at org.springframework.ide.eclipse.beans.ui.properties.ConfigFilesTab.access$0(ConfigFilesTab.java:380)	at org.springframework.ide.eclipse.beans.ui.properties.ConfigFilesTab$1.widgetSelected(ConfigFilesTab.java:146)	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1561)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1585)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1570)	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1360)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3482)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3068)	at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)	at org.eclipse.jface.window.Window.open(Window.java:801)	at org.eclipse.ui.dialogs.PropertyDialogAction.run(PropertyDialogAction.java:157)	at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)	at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:119)	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:472)	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:824)	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:882)	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:571)	at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:512)	at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:127)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1130)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1560)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1585)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1570)	at org.eclipse.swt.widgets.Control.traverse(Control.java:4210)	at org.eclipse.swt.widgets.Control.translateTraversal(Control.java:4165)	at org.eclipse.swt.widgets.Control.kEventTextInputUnicodeForKeyEvent(Control.java:2242)	at org.eclipse.swt.widgets.Widget.textInputProc(Widget.java:1995)	at org.eclipse.swt.widgets.Display.textInputProc(Display.java:3970)	at org.eclipse.swt.internal.carbon.OS.SendEventToEventTarget(Native Method)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3051)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)	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:386)	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:585)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)	at org.eclipse.equinox.launcher.Main.run(Main.java:1236)