CsvException

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class CsvException extends Exception {
  public CsvException(String filename, String reason) {
    super("Error processing " + filename + (reason.length() > 0 ? ": " + reason : ""));
    }
  }
  public class TooManyEntriesException extends CsvException {
    public TooManyEntriesException(String filename, int row) {
      super(filename, "too many entries in row " + row);
    }
  }
  public class NotEnoughEntriesException extends CsvException {
    public NotEnoughEntriesException(String filename, int row) {
      super(filename, "not enough entries in row " + row);
    }
  }
  public class UnmatchedQuoteException extends CsvException {
    public UnmatchedQuoteException(String filename, int row) {
      super(filename, "unmatched quote in row " + row);
  }
}