java.lang.NullPointerException
        at org.jboss.tools.jst.web.kb.internal.KbProject.getStorageFile(KbProject.java:429)
        at org.jboss.tools.jst.web.kb.internal.KbProject.store(KbProject.java:410)
        at org.jboss.tools.jst.web.kb.WebKbPlugin$1.saving(WebKbPlugin.java:62)
        at org.eclipse.core.internal.resources.SaveManager.executeLifecycle(SaveManager.java:382)
        at org.eclipse.core.internal.resources.SaveManager$1.run(SaveManager.java:191)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.resources.SaveManager.broadcastLifecycle(SaveManager.java:194)
        at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1129)
        at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1108)
        at org.eclipse.core.internal.resources.DelayedSnapshotJob.run(DelayedSnapshotJob.java:51)
        at org.eclipse.core.internal.resources.SaveManager.shutdown(SaveManager.java:1390)
        at org.eclipse.core.internal.resources.Workspace.close(Workspace.java:604)
        at org.eclipse.core.resources.ResourcesPlugin.stop(ResourcesPlugin.java:415)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:771)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.stop(BundleContextImpl.java:764)
        at org.eclipse.osgi.framework.internal.core.BundleHost.stopWorker(BundleHost.java:510)
        at org.eclipse.osgi.framework.internal.core.AbstractBundle.suspend(AbstractBundle.java:565)
        at org.eclipse.osgi.framework.internal.core.Framework.suspendBundle(Framework.java:1160)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.decFWSL(StartLevelManager.java:595)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:257)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.shutdown(StartLevelManager.java:215)
        at org.eclipse.osgi.framework.internal.core.InternalSystemBundle.suspend(InternalSystemBundle.java:284)
        at org.eclipse.osgi.framework.internal.core.Framework.shutdown(Framework.java:690)
        at org.eclipse.osgi.framework.internal.core.Framework.close(Framework.java:597)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.shutdown(EclipseStarter.java:390)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:198)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        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)