public final class Paths {
  private Paths() {
  }

  public static Path get(String first, String... more) {
    return Path.of(first, more);
  }

  public static Path get(URI uri) {
    return Path.of(uri);
  }
}

public interface Path extends Comparable<Path>, Iterable<Path>, Watchable {
  
  ...
  
  static Path of(String first, String... more) {
    return FileSystems.getDefault().getPath(first, more);
  }

Path path = Paths.get(".")
  .resolve("inputAuthors.csv");

File inputFile = path.toFile();

InputStream inputStream =
  new FileInputStream(inputFile);

while (true) {
  int read = inputStream.read();
  if (read == -1) {
    break;
  }
  System.out.print((char) read);
}

inputStream.close();

Path inputPath = Paths.get("inputAuthors.csv");
File inputFile = inputPath.toFile();
InputStream fis = new FileInputStream(inputFile);

Path copyPath = Paths.get(".", "copyAuthors.csv");
File copyFile = copyPath.ToFile();
OutputStream fos = new FileOutputStream(copyFile);

byte[] buffer = new byte[4096];
while (true) {
  int read = fis.read(buffer);
  if (read == -1) {
    break;
  }
  fos.write(buffer, 0, read);
}

fis.close();
fos.close();

Path path = Paths.get("inputAuthors.csv");
File file = path.toFile();
InputStream fis = new FileInputStream(file);

Reader reader = new InputStreamReader(
  fis, StandardCharsets.UTF_8);

BufferedReader lineReader = 
  new BufferedReader(reader);

while (true) {
  String readLine = lineReader.readLine();
  if (Objects.isNull(readLine)) {
    break;
  }
  System.out.println(readLine);
}

lineReader.close();

Path path = Paths.get("inputAuthors.csv");
String charset = StandardCharsets.UTF_8.name;

Scanner scanner = new Scanner(path, charset);

while (scanner.hasNext()) {
  System.out.println(scanner.nextLine());
}

scanner.close();

Path path = Paths.get(
  "/","tmp", "test-file.log");

Writer writer = new FileWriter(
  path.toFile(),
  StandardCharsets.UTF_8);

Writer buffer = new BufferedWriter(writer);

List<String> list = Arrays.asList(
  "Hello", " ", "world", "!");

for (String o : list) {
  buffer.write(o);
}

buffer.close();

for (String o : list) {
  buffer.write(o);
}

buffer.close();

try {
  BufferedWriter buffWriter =
    Files.newBufferedWriter(path);
      
  //Блок кода бросающий исключение IOException
  //Например кончилось место на диске
  buffWriter.write("someText");

  buffWriter.close();
}
catch (IOException e) {
  buffWriter.close();
}

try {
  BufferedWriter buffWriter =
    Files.newBufferedWriter(path);
      
  //Блок кода бросающий исключение IOException
  //Например кончилось место на диске
  buffWriter.write("someText");

  //Блок кода, бросающий
  //непредвиденное исключение
  throw new IllegalArgumentException();

  buffWriter.close();
}
catch (IOException e) {
  buffWriter.close();
} finally {
  buffWriter.close();
}

try (BufferedReader lineReader = new BufferedReader(reader)) {

  while (true) {
    String line = readLine = lineReader.readLine();
    if (line == null) {
      break;
    }
    System.out.println(readLine);
  }
}

IOAdapter<Author> authorAdapter = 
  new CSVAdapterImpl<>(Author.class,authorFileReader,authorFileWriter);

Author author = authorCsvAdapter.read(0);
assertEquals("Лев Николаевич Толстой",author.getName());
assertEquals("Ясная Поляна",author.getBirthPlace());

Author authorNew = new Author("Некоторый Автор", "Некоторый Город");

int rowIndex = authorCsvAdapter.append(authorNew);
Author authorNewOpened = authorCsvAdapter.read(rowIndex);

assertEquals("Некоторый Автор",author.getName());
assertEquals("Некоторый Город",author.getBirthPlace());

IOAdapter<Book> bookAdapter = 
  new CSVAdapterImpl<>(Book.class,bookFileReader,bookFileWriter);

...

IOAdapter<Author> authorAdapter = 
  new CSVAdapterImpl<>(Author.class,authorFileReader,authorFileWriter);
...
IOAdapter<Book> bookAdapter = 
  new CSVAdapterImpl<>(Book.class,bookFileReader,bookFileWriter);

Author author = authorCsvAdapter.read(0);
assertEquals("Лев Николаевич Толстой",author.getName());
assertEquals("Ясная Поляна",author.getBirthPlace());

Author authorNew = new Author("Некоторый Автор", "Некоторый Город");
int rowIndex = authorCsvAdapter.append(authorNew);
Author authorNewOpened = authorCsvAdapter.read(rowIndex);
assertEquals("Некоторый Автор",author.getName());
assertEquals("Некоторый Город",author.getBirthPlace());