Program: 92759
Project: 92759
Buggy source:
@Override @SuppressWarnings({"String_Node_Str","String_Node_Str"}) public Object execute(ExecutionEvent event) throws ExecutionException {
  IWorkbenchWindow window=PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  if (window == null)   return null;
  if (fTrace == null) {
    return null;
  }
  TmfEvent traceEvent=fTrace.instantiateEvent();
  ITmfTrace trace=fTrace.instantiateTrace();
  if (trace == null) {
    displayErrorMsg(Messages.OpenTraceHandler_NoTraceType);
    return null;
  }
  String editorId=fTrace.getEditorId();
  boolean usesEditor=editorId != null && editorId.length() > 0;
  try {
    trace.initTrace(fTrace.getLocation().getPath(),traceEvent.getClass(),usesEditor);
  }
 catch (  FileNotFoundException e) {
    displayErrorMsg(Messages.OpenTraceHandler_NoTrace);
    return null;
  }
  if (usesEditor) {
    try {
      IResource resource=fTrace.getResource();
      IEditorInput editorInput=new TmfEditorInput(resource,trace);
      IWorkbench wb=PlatformUI.getWorkbench();
      IWorkbenchPage activePage=wb.getActiveWorkbenchWindow().getActivePage();
      IEditorPart editor=activePage.findEditor(editorInput);
      if (editor != null && editor instanceof IReusableEditor) {
        activePage.reuseEditor((IReusableEditor)editor,editorInput);
        activePage.activate(editor);
      }
 else {
        editor=activePage.openEditor(editorInput,editorId);
      }
    }
 catch (    PartInitException e) {
      e.printStackTrace();
    }
  }
 else {
    TmfExperiment<?> currentExperiment=TmfExperiment.getCurrentExperiment();
    if (currentExperiment != null) {
      currentExperiment.dispose();
    }
    ITmfTrace[] traces=new ITmfTrace[]{trace};
    TmfExperiment experiment=new TmfExperiment(traceEvent.getClass(),fTrace.getName(),traces,trace.getCacheSize());
    TmfExperiment.setCurrentExperiment(experiment);
    TmfSignalManager.dispatchSignal(new TmfExperimentSelectedSignal(this,experiment));
  }
  return null;
}

Fixed version (ground truth):
@Override @SuppressWarnings({"String_Node_Str","String_Node_Str"}) public Object execute(ExecutionEvent event) throws ExecutionException {
  IWorkbenchWindow window=PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  if (window == null)   return null;
  if (fTrace == null) {
    return null;
  }
  TmfEvent traceEvent=fTrace.instantiateEvent();
  ITmfTrace trace=fTrace.instantiateTrace();
  if (trace == null) {
    displayErrorMsg(Messages.OpenTraceHandler_NoTraceType);
    return null;
  }
  String editorId=fTrace.getEditorId();
  boolean usesEditor=editorId != null && editorId.length() > 0;
  try {
    trace.initTrace(fTrace.getLocation().getPath(),traceEvent.getClass(),usesEditor);
  }
 catch (  FileNotFoundException e) {
    displayErrorMsg(Messages.OpenTraceHandler_NoTrace);
    return null;
  }
  if (usesEditor) {
    try {
      IResource resource=fTrace.getResource();
      IEditorInput editorInput=new TmfEditorInput(resource,trace);
      IWorkbench wb=PlatformUI.getWorkbench();
      IWorkbenchPage activePage=wb.getActiveWorkbenchWindow().getActivePage();
      IEditorPart editor=activePage.findEditor(editorInput);
      if (editor != null && editor instanceof IReusableEditor) {
        activePage.reuseEditor((IReusableEditor)editor,editorInput);
        activePage.activate(editor);
      }
 else {
        editor=activePage.openEditor(editorInput,editorId);
        if (resource instanceof IFile) {
          IDE.setDefaultEditor((IFile)resource,editorId);
        }
      }
    }
 catch (    PartInitException e) {
      e.printStackTrace();
    }
  }
 else {
    TmfExperiment<?> currentExperiment=TmfExperiment.getCurrentExperiment();
    if (currentExperiment != null) {
      currentExperiment.dispose();
    }
    ITmfTrace[] traces=new ITmfTrace[]{trace};
    TmfExperiment experiment=new TmfExperiment(traceEvent.getClass(),fTrace.getName(),traces,trace.getCacheSize());
    TmfExperiment.setCurrentExperiment(experiment);
    TmfSignalManager.dispatchSignal(new TmfExperimentSelectedSignal(this,experiment));
  }
  return null;
}