FizzBuzz Java (using CharSequence)

FizzBuzz.java

public class Main {

    public static void main(String[] args) throws Exception {
        System.out.println(new StringBuilderFizzBuzz(100).get());
        System.out.println(new StringFizzBuzz(100).get());
    }

    private static abstract class FizzBuzz<C extends CharSequence> {

        private final int limit;

        private final C appendable;

        FizzBuzz(int limit, C appendable) {
            this.limit = limit;
            this.appendable = build(appendable, 1);
        }

        private C build(C appendable, int i) {
            if(i%3 == 0) {
                appendable = append(appendable, "Fizz");
            }

            if(i%5 == 0) {
                appendable = append(appendable, "Buzz");
            } else if(i%3 != 0) {
                appendable = append(appendable, Integer.toString(i,10));
            }

            return (i < this.limit) ? build(append(appendable, ","), ++i) : appendable;
        }

        abstract C append(C appendable, String value);

        C get() {
            return this.appendable;
        }

    }

    private static class StringBuilderFizzBuzz extends FizzBuzz<StringBuilder> {

        StringBuilderFizzBuzz(int i) {
            super(i, new StringBuilder());
        }

        @Override
        StringBuilder append(StringBuilder appendable, String value) {
            return appendable.append(value);
        }
    }

    private static class StringFizzBuzz extends FizzBuzz<String> {

        StringFizzBuzz(int i) {
            super(i, "");
        }

        @Override
        String append(String appendable, String value) {
            appendable = appendable + value;
            return appendable;
        }
    }

}

absolutely unnecessary way to solve the FizzBuzz problem, but yet another way to solve it...