java.lang.NullPointerException
at org.jboss.tools.jst.web.kb.WebKbPlugin.cleanObsoleteFiles(WebKbPlugin.java:96)
at org.jboss.tools.jst.web.kb.WebKbPlugin.access$0(WebKbPlugin.java:92)
at org.jboss.tools.jst.web.kb.WebKbPlugin$1.saving(WebKbPlugin.java:77)
at org.eclipse.core.internal.resources.SaveManager.executeLifecycle(SaveManager.java:361)
at org.eclipse.core.internal.resources.SaveManager$1.run(SaveManager.java:170)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.resources.SaveManager.broadcastLifecycle(SaveManager.java:173)
at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1108)
at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1087)
at org.eclipse.core.internal.resources.DelayedSnapshotJob.run(DelayedSnapshotJob.java:44)
at org.eclipse.core.internal.resources.SaveManager.shutdown(SaveManager.java:1366)
at org.eclipse.core.internal.resources.Workspace.close(Workspace.java:428)
at org.eclipse.core.resources.ResourcesPlugin.stop(ResourcesPlugin.java:383)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:843)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.stop(BundleContextImpl.java:836)
at org.eclipse.osgi.framework.internal.core.BundleHost.stopWorker(BundleHost.java:501)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.suspend(AbstractBundle.java:550)
at org.eclipse.osgi.framework.internal.core.Framework.suspendBundle(Framework.java:1097)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.decFWSL(StartLevelManager.java:597)
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:266)
at org.eclipse.osgi.framework.internal.core.Framework.shutdown(Framework.java:690)
at org.eclipse.osgi.framework.internal.core.Framework.close(Framework.java:588)
at org.eclipse.core.runtime.adaptor.EclipseStarter.shutdown(EclipseStarter.java:415)
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:619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)