EDIT

while closing the editor this NPE appeared:

login : s.wutke
editor version : 4.14.0
server : api.cybertaxonomy.org (cybertaxonomy.org) / flora-cuba
schema version : 4.7.0.0.201710040000
os : Windows 7 6.1 amd64
java : 1.8.0_161
java.lang.NullPointerException
                at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:247)
                at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:90)
                at org.eclipse.e4.ui.internal.workbench.PartServiceSaveHandler.save(PartServiceSaveHandler.java:57)
                at org.eclipse.ui.internal.WorkbenchWindow$7.save(WorkbenchWindow.java:594)
                at org.eclipse.e4.ui.internal.workbench.PartServiceSaveHandler.saveParts(PartServiceSaveHandler.java:84)
                at org.eclipse.ui.internal.WorkbenchWindow$7.saveParts(WorkbenchWindow.java:610)
                at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.saveAll(PartServiceImpl.java:1415)
                at org.eclipse.e4.ui.internal.workbench.ApplicationPartServiceImpl.saveAll(ApplicationPartServiceImpl.java:165)
                at eu.etaxonomy.taxeditor.LifeCycleManager.subscribeAppShutdownStarted(LifeCycleManager.java:85)
                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
                at java.lang.reflect.Method.invoke(Unknown Source)
                at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
                at org.eclipse.e4.ui.internal.di.UIEventObjectSupplier$UIEventHandler$1.run(UIEventObjectSupplier.java:56)
                at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:233)
                at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:145)
                at org.eclipse.swt.widgets.Display.syncExec(Display.java:4821)
                at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:211)
                at org.eclipse.e4.ui.internal.di.UIEventObjectSupplier$UIEventHandler.handleEvent(UIEventObjectSupplier.java:53)
                at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:201)
                at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197)
                at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
                at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
                at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
                at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135)
                at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78)
                at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39)
                at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:94)
                at org.eclipse.e4.ui.workbench.UIEvents.publishEvent(UIEvents.java:375)
                at org.eclipse.e4.ui.workbench.UIEvents.publishEvent(UIEvents.java:344)
                at org.eclipse.ui.internal.Workbench.busyClose(Workbench.java:1120)
                at org.eclipse.ui.internal.Workbench.access$22(Workbench.java:1118)
                at org.eclipse.ui.internal.Workbench$19.run(Workbench.java:1459)
                at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
                at org.eclipse.ui.internal.Workbench.close(Workbench.java:1456)
                at org.eclipse.ui.internal.Workbench.close(Workbench.java:1429)
                at org.eclipse.ui.internal.WorkbenchWindow.busyClose(WorkbenchWindow.java:1594)
                at org.eclipse.ui.internal.WorkbenchWindow.access$16(WorkbenchWindow.java:1540)
                at org.eclipse.ui.internal.WorkbenchWindow$11.run(WorkbenchWindow.java:1626)
                at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
                at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:1623)
                at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:1637)
                at org.eclipse.ui.internal.WorkbenchWindow$6.close(WorkbenchWindow.java:524)
                at org.eclipse.e4.ui.workbench.renderers.swt.WBWRenderer$7.shellClosed(WBWRenderer.java:629)
                at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:99)
                at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
                at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4418)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1103)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1088)
                at org.eclipse.swt.widgets.Decorations.closeWidget(Decorations.java:315)
                at org.eclipse.swt.widgets.Decorations.WM_CLOSE(Decorations.java:1728)
                at org.eclipse.swt.widgets.Control.windowProc(Control.java:4801)
                at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:359)
                at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1656)
                at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2199)
                at org.eclipse.swt.widgets.Display.windowProc(Display.java:5110)
                at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
                at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2547)
                at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:506)
                at org.eclipse.swt.widgets.Control.windowProc(Control.java:4897)
                at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:359)
                at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1656)
                at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2199)
                at org.eclipse.swt.widgets.Display.windowProc(Display.java:5110)
                at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
                at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2547)
                at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:506)
                at org.eclipse.swt.widgets.Control.windowProc(Control.java:4897)
                at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:359)
                at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1656)
                at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2199)
                at org.eclipse.swt.widgets.Display.windowProc(Display.java:5110)
                at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
                at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2552)
                at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3822)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)
                at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)
                at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)
                at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693)
                at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
                at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610)
                at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
                at eu.etaxonomy.taxeditor.Application.start(Application.java:24)
                at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
                at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
                at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
                at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
                at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
                at java.lang.reflect.Method.invoke(Unknown Source)
                at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)
                at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)
                at org.eclipse.equinox.launcher.Main.run(Main.java:1519)