public void deleteEntry(String entryName) throws IOException {
        File inputFile = new File(fileName);
        File tempFile = new File("temp.txt");

        BufferedReader reader = new BufferedReader(new FileReader(inputFile));
        BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));

        String lineToRemove = entryName;
        String currentLine;

        while((currentLine = reader.readLine()) != null) {
            String trimmedLine = currentLine.trim();
            if(trimmedLine.contains(lineToRemove)) continue;
            writer.write(currentLine + System.getProperty("line.separator"));
        }
        writer.close();
        reader.close();
        boolean works = tempFile.renameTo(inputFile);