refactored MongoModel to hide fetch method, fixed PHPDoc errors

model/MongoDbCommand.php

@@ -22,6 +22,12 @@ class MongoCommandBuilder
 
     const COMMAND = 'Command';
 
+
+    /**
+     * @param string $type
+     * @param MongoCollection $collection
+     * @return MongoDbCommand
+     */
     static public function factory($type, $collection = null)
     {
         $class = ucfirst($type) . 'MongoCommand';
@@ -33,8 +39,18 @@ class MongoCommandBuilder
 
 abstract class MongoDbCommand
 {
+
+    /**
+     * @var MongoCollection
+     */
     protected $collection;
 
+    /**
+     * Execute Mongo command/query
+     *
+     * @return mixed
+     * @throws GeneralException
+     */
     public function execute()
     {
         if ($this->checkParams()) {
@@ -44,6 +60,12 @@ abstract class MongoDbCommand
         }
     }
 
+
+    /**
+     * @param string $name Parameter name
+     * @param mixed $value Parameter value
+     * @return MongoDbCommand
+     */
     public function bindParam($name, $value)
     {
         if (property_exists($this, $name)) {
@@ -52,12 +74,22 @@ abstract class MongoDbCommand
         return $this;
     }
 
+    /**
+     * @param MongoCollection $collection Mongo collection
+     * @return MongoDbCommand
+     */
     public function setCollection($collection)
     {
         $this->collection = $collection;
         return $this;
     }
 
+    /**
+     * Convert query parameters array to string
+     *
+     * @param array $array
+     * @return string
+     */
     protected function arrayToString($array)
     {
         $string =  '[';