try (BufferedReader br = new BufferedReader(new FileReader(sourceFile))) {
            String line = br.readLine();
            while (line != null) {
                lineNumber++;
                gatherDeadLinksInLine(sourceFile, line, lineNumber, errorsForFile);
                gatherDeadJavadocLinksInLine(sourceFile, line, lineNumber, errorsForFile);
                gatherMarkdownLinksInLine(sourceFile, line, lineNumber, errorsForFile);