RTEditor/src/main/java/com/onegravity/rteditor/converter/tagsoup/HTMLWriter.java
private void write(char c) throws SAXException {
        try {
            output.write(c);
        } catch (IOException e) {
            throw new SAXException(e);
        }
    }
private void write(char c) throws SAXException {
        try {
            output.write(c);
        } catch (IOException e) {
            throw new SAXException(e);
        }
    }
Write a raw character.

@param c The character to write.
@throws org.xml.sax.SAXException If there is an error writing the character, this method
will throw an IOException wrapped in a SAXException.