import java.util.List;
import java.util.ArrayList;

class Book
{
    private String title;
    private String publisher;
    private int year;

    public Book(String title, String publisher, int year)
    {
        this.title = title;
        this.publisher = publisher;
        this.year = year;
    }

    public String title()
    {
        return title;
    }

    public String publisher()
    {
        return publisher;
    }

    public int year()
    {
        return year;
    }

    @Override
    public String toString()
    {
        return title + ", " + publisher + ", " + year;
    }
}

class Library
{
    List<Book> books = new ArrayList<>();

    public Library()
    {

    }

    public void addBook(Book newBook)
    {
        books.add(newBook);
    }

    public void printBooks()
    {
        for (Book book : books)
        {
            System.out.println(book);
        }
    }
}

public class Program
{
    public static void main(String[] args)
    {
        Library library = new Library();
        Book cheese = new Book("Cheese Problems Solved", "Woodhead Publishing", 2007);
        library.addBook(cheese);

        Book nhl = new Book("NHL Hockey", "Stanley Kupp", 1952);
        library.addBook(nhl);

        library.addBook(new Book("Battle Axes", "Tom A. Hawk", 1851));

        library.printBooks();
    }
}