Program: 11956
Project: 11956
Buggy source:
public void run(IAction action){
  store=getIPreferenceStore();
  Configuration config=getConfiguration(store,selection);
  PropertiesLoader props=getPropertiesLoader(store.getString(Preference.lang));
  StructuredSelection structuredSelection=null;
  try {
    if (selection instanceof StructuredSelection) {
      structuredSelection=(StructuredSelection)selection;
    }
    if (isNotSelected(structuredSelection)) {
      openWarningForRequired(props);
      return;
    }
 else     if (isSelectedSeveral(structuredSelection)) {
      openWarningForSelectOneOnly(props);
      return;
    }
    String resourcePathForTestClassFile=getResourcePathForTargetClassFile(structuredSelection);
    String projectName=getProjectName(structuredSelection);
    String projectRootPath=getWorkspaceRootAbsolutePath(getIWorkspaceRoot()) + StringValue.DirectorySeparator.General + projectName+ StringValue.DirectorySeparator.General;
    if (!resourcePathForTestClassFile.matches("String_Node_Str" + RegExp.FileExtension.JavaFile)) {
      openWarningForSelectJavaFile(props);
      return;
    }
    String resourcePathForTargetClassFile=resourcePathForTestClassFile.replaceFirst(config.directoryPathOfTestSourceCode,config.directoryPathOfProductSourceCode);
    File openTargetIOFile=new File(projectRootPath + resourcePathForTargetClassFile);
    if (!openTargetIOFile.exists()) {
      return;
    }
    int retryCount=0;
    IEditorPart editorPart=null;
    while (true) {
      try {
        IProject project=getIProject(projectName);
        IWorkbenchPage page=getIWorkbenchPage();
        IFile targetClassFile=getIFile(project,resourcePathForTargetClassFile);
        editorPart=getIEditorPart(page,targetClassFile);
        editorPart.setFocus();
      }
 catch (      Exception e) {
        e.printStackTrace();
        retryCount++;
        if (retryCount > 10) {
          break;
        }
        ThreadUtil.sleep(1500);
      }
      break;
    }
  }
 catch (  Exception e) {
    e.printStackTrace();
  }
}

Fixed version (ground truth):
public void run(IAction action){
  store=getIPreferenceStore();
  Configuration config=getConfiguration(store,selection);
  PropertiesLoader props=getPropertiesLoader(store.getString(Preference.lang));
  StructuredSelection structuredSelection=null;
  try {
    if (selection instanceof StructuredSelection) {
      structuredSelection=(StructuredSelection)selection;
    }
    if (isNotSelected(structuredSelection)) {
      openWarningForRequired(props);
      return;
    }
 else     if (isSelectedSeveral(structuredSelection)) {
      openWarningForSelectOneOnly(props);
      return;
    }
    String resourcePathForTestClassFile=getResourcePathForTargetClassFile(structuredSelection);
    String projectName=getProjectName(structuredSelection);
    String projectRootPath=getIWorkspaceRoot().findMember(projectName).getLocationURI().getPath() + StringValue.DirectorySeparator.General;
    if (!resourcePathForTestClassFile.matches("String_Node_Str" + RegExp.FileExtension.JavaFile)) {
      openWarningForSelectJavaFile(props);
      return;
    }
    String resourcePathForTargetClassFile=resourcePathForTestClassFile.replaceFirst(config.directoryPathOfTestSourceCode,config.directoryPathOfProductSourceCode);
    File openTargetIOFile=new File(projectRootPath + resourcePathForTargetClassFile);
    if (!openTargetIOFile.exists()) {
      return;
    }
    int retryCount=0;
    IEditorPart editorPart=null;
    while (true) {
      try {
        IProject project=getIProject(projectName);
        IWorkbenchPage page=getIWorkbenchPage();
        IFile targetClassFile=getIFile(project,resourcePathForTargetClassFile);
        editorPart=getIEditorPart(page,targetClassFile);
        editorPart.setFocus();
      }
 catch (      Exception e) {
        e.printStackTrace();
        retryCount++;
        if (retryCount > 10) {
          break;
        }
        ThreadUtil.sleep(1500);
      }
      break;
    }
  }
 catch (  Exception e) {
    e.printStackTrace();
  }
}