code: public static File createDirectory(File parent, String name) {
          File created = new File(parent, name);
          checkDirectory(created);
          return created;
      }
docs: Create directory with given name in specified directory. Check created directory using
  {@link #checkDirectory(java.io.File)}
  
  @param parent specified parent directory
  @param name   given name for directory to create
  @return created directory
  @throws ReportGenerationException if can't create specified directory