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java.lang.NullPointerException: 	at de.ovgu.featureide.fm.core.color.FeatureColorManager.getProject(FeatureColorManager.java:296)	at de.ovgu.featureide.fm.core.color.FeatureColorManager.getCurrentColorScheme(FeatureColorManager.java:141)	at de.ovgu.featureide.fm.core.color.FeatureColorManager.getCurrentColorScheme(FeatureColorManager.java:134)	at de.ovgu.featureide.fm.core.color.FeatureColorManager.getColor(FeatureColorManager.java:63)	at de.ovgu.featureide.fm.ui.views.outline.FmLabelProvider.getBackground(FmLabelProvider.java:121)	at de.ovgu.featureide.ui.views.collaboration.outline.FMOutlineLabelProviderWrapper.getBackground(FMOutlineLabelProviderWrapper.java:112)	at org.eclipse.jface.viewers.WrappedViewerLabelProvider.getBackground(WrappedViewerLabelProvider.java:91)	at org.eclipse.jface.viewers.WrappedViewerLabelProvider.update(WrappedViewerLabelProvider.java:149)	at org.eclipse.jface.viewers.ViewerColumn.refresh(ViewerColumn.java:154)	at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:949)	at org.eclipse.jface.viewers.AbstractTreeViewer$UpdateItemSafeRunnable.run(AbstractTreeViewer.java:114)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:173)	at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:1029)	at org.eclipse.jface.viewers.StructuredViewer$UpdateItemSafeRunnable.run(StructuredViewer.java:473)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:173)	at org.eclipse.jface.viewers.StructuredViewer.updateItem(StructuredViewer.java:2176)	at org.eclipse.jface.viewers.AbstractTreeViewer.updateChildren(AbstractTreeViewer.java:2755)	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefreshStruct(AbstractTreeViewer.java:1916)	at org.eclipse.jface.viewers.TreeViewer.internalRefreshStruct(TreeViewer.java:684)	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1891)	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1848)	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1834)	at org.eclipse.jface.viewers.StructuredViewer$7.run(StructuredViewer.java:1526)	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1462)	at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:366)	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1423)	at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1523)	at org.eclipse.jface.viewers.ColumnViewer.refresh(ColumnViewer.java:522)	at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1482)	at org.eclipse.jface.viewers.ContentViewer.setLabelProvider(ContentViewer.java:323)	at org.eclipse.jface.viewers.StructuredViewer.setLabelProvider(StructuredViewer.java:2222)	at org.eclipse.jface.viewers.ColumnViewer.setLabelProvider(ColumnViewer.java:351)	at de.ovgu.featureide.ui.views.collaboration.outline.Outline$12.runInUIThread(Outline.java:596)	at org.eclipse.ui.progress.UIJob$1.run(UIJob.java:97)	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4155)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3772)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:694)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:606)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)	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:380)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)	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:669)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)	at org.eclipse.equinox.launcher.Main.run(Main.java:1515)	at org.eclipse.equinox.launcher.Main.main(Main.java:1488)