String line = br.readLine();
            while (line != null) {
                lineNumber++;
                gatherDeadLinksInLineSamples(sourceFile, line, lineNumber, errorsForFile);
                gatherDeadJavadocLinksInLine(sourceFile, line, lineNumber, errorsForFile);
                gatherMarkdownLinksInLine(sourceFile, line, lineNumber, errorsForFile);