code: void writeDefaultConstructor(Definition def, Writer out, int indent) throws IOException
     {
        writeWithIndent(out, indent, "/**\n");
        writeWithIndent(out, indent, " * Default constructor\n");
        writeWithIndent(out, indent, " */\n");
  
        //constructor
        writeWithIndent(out, indent, "public " + getClassName(def) + "()");
        writeLeftCurlyBracket(out, indent);
        writeRightCurlyBracket(out, indent);
        writeEol(out);
     }
docs: Output Default Constructor
  
  @param def    definition
  @param out    Writer
  @param indent space number
  @throws IOException ioException