private PDFileSpecification createFileSpecification(COSBase cosBase) {
        try {
            return PDFileSpecification.createFS(cosBase);
        } catch (IOException e) {
            //swallow for now
        }
        return null;
    }
See TIKA-2845 for why we need to override this.

@param pages
@throws IOException
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-pdf-module/src/main/java/org/apache/tika/parser/pdf/AbstractPDF2XHTML.java