A basic setup for a jQuery plugin

base_plugin.js

//PLUGINNAME === Pluginname  (UpperCase first letter)
//PLUGIN === pluginname    (all lowercase)

var PLUGINNAME = function( $elm, options ) {

  this.debug = false;
  this.$el = $elm;
  this.options = jQuery.extend( true, {}, $.fn.PLUGIN.defaults, options );
  this.$el.data('PLUGINNAME', this);

};

PLUGINNAME.prototype = {

  init : function () { },
  destroy : function () { }

};

jQuery.fn.PLUGIN = function( options ){
  if ( typeof options !== 'string' ) {
    return this.each( function () {
      var obj = new PLUGINNAME( jQuery( this ), options );
      obj.init();
    });
  } else {
    PLUGINNAME = $(this).data('PLUGINNAME');
    if ( PLUGINNAME !== null ) {
      switch( options ) {
        case 'init':
          PLUGINNAME.init();
          break;
        case 'destroy':
          PLUGINNAME.destroy();
          break;
      }
    }
  }
};

jQuery.fn.PLUGIN.defaults = {

};