gistfile1.java

public class GenericsSample2 {
    /** Parser */
    public static abstract class Parser<M extends Model<M>> {
        public abstract M parse();
    }
    /** Model */
    public static abstract class Model<M extends Model<M>> {}

    /** UserParser */
    public static class UserParser extends Parser<UserModel>{
        @Override
        public UserModel parse() {
            return null; // TODO
        }
    }
    /** UserModel */
    public static class UserModel extends Model<UserModel> {}
}