code: public boolean setFilesChanged(String filesChangedStr) {
      try {
        this.filesChanged = Integer.parseInt(filesChangedStr);
        return true;
      } catch (NumberFormatException e) {
        return false;
      }
    }
docs: Sets the number of files changed during a commit.
  
  @param filesChangedStr
  The number of files changed in <code>String</code> format.
  @return True if the <code>filesChangedStr</code> parameter is a <code>String</code>
  representing a number. False if the <code>String</code> does not contain a parsable
  integer.