@Override
        public void write(final char[] cbuf, final int off, final int len)
                throws IOException {
            method(WRITE_CHAR_INT_INT);
            last.append(cbuf, off, len);
            explode();
        }
Check all methods forward correctly and wrap exceptions as documented.

@author <a href="mailto:steinar@yahoo-inc.com">Steinar Knutsen</a>
vespajlib/src/test/java/com/yahoo/text/ForwardWriterTestCase.java