src/main/java/com/bazaarvoice/jackson/rison/RisonGenerator.java
@Override
    public void writeBinary(Base64Variant b64variant, byte[] data, int offset, int len)
            throws IOException, JsonGenerationException
    {
        _verifyValueWrite("write binary value");
        // Starting quotes
        if (_outputTail >= _outputEnd) {
            _flushBuffer();
        }
        _outputBuffer[_outputTail++] = '\'';
        _writeBinary(b64variant, data, offset, offset+len);
        // and closing quotes
        if (_outputTail >= _outputEnd) {
            _flushBuffer();
        }
        _outputBuffer[_outputTail++] = '\'';
    }
@Override
    public void writeBinary(Base64Variant b64variant, byte[] data, int offset, int len)
            throws IOException, JsonGenerationException
    {
        _verifyValueWrite("write binary value");
        // Starting quotes
        if (_outputTail >= _outputEnd) {
            _flushBuffer();
        }
        _outputBuffer[_outputTail++] = '\'';
        _writeBinary(b64variant, data, offset, offset+len);
        // and closing quotes
        if (_outputTail >= _outputEnd) {
            _flushBuffer();
        }
        _outputBuffer[_outputTail++] = '\'';
    }
/*
********************************************************
/* Output method implementations, base64-encoded binary
********************************************************