Introduced common exception superclass

CloudObjects/SDK/Exceptions/CoreAPIException.php

@@ -9,6 +9,6 @@ namespace CloudObjects\SDK\Exceptions;
 /**
  * An Exception that is thrown when the Core API returned an error.
  */
-class CoreAPIException extends \Exception {
+class CoreAPIException extends SDKException {
 
 }

CloudObjects/SDK/Exceptions/InvalidObjectConfigurationException.php

@@ -10,6 +10,6 @@ namespace CloudObjects\SDK\Exceptions;
  * An Exception that is thrown when an object's configuration
  * doesn't match the client's expectations.
  */
-class InvalidObjectConfigurationException extends \Exception {
+class InvalidObjectConfigurationException extends SDKException {
 
 }

CloudObjects/SDK/Exceptions/InvalidSDKConfigurationException.php

@@ -9,6 +9,6 @@ namespace CloudObjects\SDK\Exceptions;
 /**
  * An Exception that is thrown when the SDK's configuration isn't valid.
  */
-class InvalidSDKConfigurationException extends \Exception {
+class InvalidSDKConfigurationException extends SDKException {
 
 }

CloudObjects/SDK/Exceptions/SDKException.php

@@ -0,0 +1,15 @@
+<?php
+
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+ 
+namespace CloudObjects\SDK\Exceptions;
+
+/**
+ * The common superclass for all Exceptions thrown by the SDK.
+ * It is also thrown directly for errors that have no more specific Exception.
+ */
+class SDKException extends \Exception {
+
+}