Custom exceptions generator

Exceptions.js

(function(ns){

    function createException(name) {
        ns[name] = function(text) {
            var r = Error.call(this, text);
            r.name = name;
            return r;
        };
    }

    createException('RedefineException');
    createException('WrongTypeException');
    createException('ConfigurationMissingException');

}(this));