Closure no like?

foo.js

/**
 * Some class
 * @constructor
 * @param {string} name The name.
 */
var Employee = (function(){

  // private static field
  // @type {string}
  var staticVar;

  // class function a.k.a. constructor
  // @constructor
  // @param {string} name2
  var cls = function(name2) {
    // private instance field
    // @type {string}
    var name = name2;

    // public instance field
    // @type {number}
    this.age = 10;

    // private instance method
    var increment = function() {
        ++this.age;
    }.bind(this);

    // public instance method
    // @return {string}
    this.getName = function() {
        return cls.capitalize(name);
    };

    // @param {string} name2 the name
    this.setName = function(name2) {
        name = name2;
    };

    //
    this.increment = function() {
        increment();
    };

    //
    // @returns number;
    this.getAge = function() {
        return this.age;
    };
  }

  // public static field
  // @type {number}
  cls.staticVar = 0;

  // public static method
  // @param {string} name Name to Capitalize.
  // @return {string} capitalized name
  cls.capitalize = function(name){
      return name.substring(0, 1).toUpperCase() +
          name.substring(1).toLowerCase();
  };

  // private static method
  // @param {string} name
  var createWithName = function(name) {
    var obj = new cls();
    obj.setName(cls.capitalize(name));
    return obj;
  }

  return cls;
})();

var e = new Employee("joe");
console.log(e.getName());