getDocumentationRoot().getAsFileTree().matching(pattern -> pattern.include("**/*.adoc")).forEach(file -> {
            gatherDeadLinksInFile(file, errors);
        });
        reportErrors(errors, getReportFile().get().getAsFile());
    }

    private void reportErrors(Map<File, List<Error>> errors, File reportFile) {
        try (PrintWriter fw = new PrintWriter(new FileWriter(reportFile))) {
            writeHeader(fw);