java.lang.NullPointerException
at org.jboss.tools.common.model.markers.XMarkerManager.resourceChanged(XMarkerManager.java:53)
at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)
at org.eclipse.core.internal.events.NotificationManager.handleEvent(NotificationManager.java:249)
at org.eclipse.core.internal.resources.Workspace.broadcastEvent(Workspace.java:390)
at org.eclipse.core.internal.resources.Project.close(Project.java:199)
at org.eclipse.ui.actions.CloseResourceAction.invokeOperation(CloseResourceAction.java:129)
at org.eclipse.ui.actions.WorkspaceAction.execute(WorkspaceAction.java:164)
at org.eclipse.ui.actions.WorkspaceAction$2.runInWorkspace(WorkspaceAction.java:485)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)