code: public static String generateSwidFileName(final String regId, final String productName,
              final String uniqueSoftwareId) {
          return generateSwidFileName(regId, productName, uniqueSoftwareId, null);
      }
docs: <p>
  Generate SWID tag file name.
  </p>
  <p>
  Example: <code>&lt;regid&gt;_&lt;product_name&gt;‐&lt;unique_software_identifier&gt;.swidtag</code>
  </p>
  
  @param regId
  the regid value
  @param productName
  the product name
  @param uniqueSoftwareId
  the unique software identifier
  @return SWID tag file name