Added missing MissingModelException class.

src/Model/Error/MissingModelException.php

@@ -0,0 +1,27 @@
+<?php
+/**
+ * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
+ * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * For full copyright and license information, please see the LICENSE.txt
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ * @link          http://cakephp.org CakePHP(tm) Project
+ * @since         3.0.0
+ * @license       http://www.opensource.org/licenses/mit-license.php MIT License
+ */
+namespace Cake\Model\Error;
+
+use Cake\Error\Exception;
+
+/**
+ * Used when a model cannot be found.
+ *
+ */
+class MissingModelException extends Exception {
+
+	protected $_messageTemplate = 'Model class %s could not be found.';
+
+}

src/Model/ModelAwareTrait.php

@@ -70,7 +70,7 @@ protected function _setModelClass($name) {
  * @param string $type The type of repository to load. Defaults to 'Table' which
  *   delegates to Cake\ORM\TableRegistry.
  * @return bool True when single repository found and instance created.
- * @throws \Cake\Model\Error\MissingModelException if the model class cannot be found.
+ * @throws \Cake\Model\Error\MissingModelException If the model class cannot be found.
  * @throws \Cake\Error\Exception When using a type that has not been registered.
  */
 	public function loadModel($modelClass = null, $type = 'Table') {

src/TestSuite/Fixture/TestFixture.php

@@ -112,7 +112,7 @@ public function __construct() {
  * Initialize the fixture.
  *
  * @return void
- * @throws \Cake\Error\MissingModelException Whe importing from a model that does not exist.
+ * @throws \Cake\ORM\Error\MissingTableException When importing from a table that does not exist.
  */
 	public function init() {
 		if ($this->table === null) {