code: void writeConstructor(Definition def, Writer out, int indent) throws IOException
     {
        writeSimpleMethodSignature(out, indent, " * Default constructor", "public " + getClassName(def) + "()");
        writeLeftCurlyBracket(out, indent);
  
        writeWithIndent(out, indent + 1, "this.mbeanServer = null;\n");
        writeWithIndent(out, indent + 1, "this.objectName = \"" + def.getDefaultValue() + ",class=HelloWorld\";\n");
        writeWithIndent(out, indent + 1, "this.registered = false;\n\n");
  
        writeRightCurlyBracket(out, indent);
        writeEol(out);
     }
docs: Output Constructor
  
  @param def    definition
  @param out    Writer
  @param indent space number
  @throws IOException ioException