NPE while adding line at QuickFix or Editor - when file is empty #6

java.lang.NullPointerException
    at org.osmorc.manifest.lang.psi.impl.ManifestFileImpl.setHeaderValue(ManifestFileImpl.java:138)
    at org.jetbrains.osgi.manifest.impl.BundleManifestImpl.setHeaderValue(BundleManifestImpl.java:73)
    at org.osmorc.inspection.UnregisteredActivatorInspection$RegisterActivatorInManifestQuickfix.applyFix(UnregisteredActivatorInspection.java:129)
    at org.osmorc.inspection.UnregisteredActivatorInspection$RegisterActivatorInManifestQuickfix.applyFix(UnregisteredActivatorInspection.java:107)
    at com.intellij.codeInspection.ex.QuickFixWrapper.invoke(QuickFixWrapper.java:85)
    at com.intellij.codeInsight.intention.impl.ShowIntentionActionsHandler$2.run(ShowIntentionActionsHandler.java:165)
    at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1027)
    at com.intellij.codeInsight.intention.impl.ShowIntentionActionsHandler$3.run(ShowIntentionActionsHandler.java:179)
    at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:124)
    at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:99)
    at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:85)
    at com.intellij.codeInsight.intention.impl.ShowIntentionActionsHandler.chooseActionAndInvoke(ShowIntentionActionsHandler.java:184)
    at com.intellij.codeInsight.intention.impl.IntentionListStep$2$1.run(IntentionListStep.java:244)
    at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:347)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:646)
    at java.awt.EventQueue.access$000(EventQueue.java:84)
    at java.awt.EventQueue$1.run(EventQueue.java:607)
    at java.awt.EventQueue$1.run(EventQueue.java:605)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:616)
    at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:701)
    at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:526)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:349)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)