Exception in thread "Timer-0" java.lang.NullPointerException
        at org.eclipse.ui.internal.ide.application.IDEWorkbenchAdvisor.preShutdown(IDEWorkbenchAdvisor.java:331)
        at org.eclipse.ui.internal.Workbench.busyClose(Workbench.java:837)
        at org.eclipse.ui.internal.Workbench.access$15(Workbench.java:834)
        at org.eclipse.ui.internal.Workbench$22.run(Workbench.java:1078)
        at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:49)
        at org.eclipse.ui.internal.Workbench.close(Workbench.java:1076)
        at org.eclipse.ui.internal.Workbench.close(Workbench.java:1048)
        at com.zorzella.eclipse.refreshnow.RefreshNowTask.run(RefreshNowTask.java:46)
        at java.util.TimerThread.mainLoop(Timer.java:512)
        at java.util.TimerThread.run(Timer.java:462)