diff --git a/.phpmd.dist.xml b/.phpmd.dist.xml
new file mode 100644
index 00000000000..41c0e8c67d5
--- /dev/null
+++ b/.phpmd.dist.xml
@@ -0,0 +1,125 @@
+<?xml version="1.0"?>
+<ruleset name="Custom ruleset"
+         xmlns="http://pmd.sf.net/ruleset/1.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
+         xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
+    <description>
+        OpenMage ruleset
+    </description>
+
+    <!-- UNUSEDCODE
+    UnusedFormalParameter [fixed]
+    UnusedLocalVariable
+    UnusedPrivateField
+    UnusedPrivateMethod
+    -->
+    <rule ref="rulesets/unusedcode.xml" />
+
+    <!-- CLEANCODE
+    BooleanArgumentFlag
+    ElseExpression
+    ErrorControlOperator
+    DuplicatedArrayKey
+    IfStatementAssignment
+    MissingImport
+    StaticAccess
+    UndefinedVariable
+    -->
+    <rule ref="rulesets/cleancode.xml">
+        <exclude name="BooleanArgumentFlag" />
+        <exclude name="ElseExpression" /> <!-- can be fixed in some cases -->
+        <exclude name="IfStatementAssignment" /> <!-- can be fixed -->
+        <exclude name="MissingImport" /> <!-- can be fixed -->
+        <exclude name="StaticAccess" />
+        <exclude name="UndefinedVariable" /> <!-- can be fixed -->
+    </rule>
+    <rule ref="rulesets/cleancode.xml/MissingImport">
+        <properties>
+            <property name="ignore-global" value="true" />
+        </properties>
+    </rule>
+
+    <!-- CONTROVERSIAL
+    CamelCaseClassName
+    CamelCaseMethodName
+    CamelCaseParameterName
+    CamelCasePropertyName
+    CamelCaseVariableName
+    Superglobals
+    -->
+    <rule ref="rulesets/controversial.xml/CamelCaseMethodName">
+        <properties>
+            <property name="allow-underscore" value="true" />
+        </properties>
+    </rule>
+    <rule ref="rulesets/controversial.xml/CamelCaseParameterName" />
+    <rule ref="rulesets/controversial.xml/CamelCasePropertyName">
+        <properties>
+            <property name="allow-underscore" value="true" />
+        </properties>
+    </rule>
+    <rule ref="rulesets/controversial.xml/CamelCaseVariableName">
+        <properties>
+            <property name="allow-underscore" value="true" />
+        </properties>
+    </rule>
+    <rule ref="rulesets/controversial.xml/Superglobals" />
+
+    <!-- NAMEING
+    BooleanGetMethodName
+    ConstantNamingConventions
+    ConstructorWithNameAsEnclosingClass
+    LongClassName
+    ShortClassName
+    LongVariable
+    ShortVariable
+    ShortMethodName
+    -->
+    <rule ref="rulesets/naming.xml/ShortVariable">
+        <properties>
+            <property name="exceptions" value="a,b,e,id,idx,io,ip,to,x,y,x1,x2,y1,y2" />
+        </properties>
+    </rule>
+
+    <!-- DESIGN
+    CountInLoopExpression
+    CouplingBetweenObjects
+    DepthOfInheritance
+    DevelopmentCodeFragment
+    EmptyCatchBlock
+    EvalExpression
+    ExitExpression
+    GotoStatement
+    NumberOfChildren
+    -->
+    <rule ref="rulesets/design.xml">
+        <exclude name="CouplingBetweenObjects" />
+        <exclude name="DepthOfInheritance" />
+        <exclude name="NumberOfChildren" />
+    </rule>
+
+    <!-- CODESIZE
+    ExcessiveClassComplexity
+    ExcessiveClassLength
+    ExcessiveMethodLength
+    ExcessiveParameterList
+    ExcessivePublicCount
+    CyclomaticComplexity
+    NPathComplexity
+    TooManyFields
+    TooManyMethods
+    TooManyPublicMethods
+    -->
+    <rule ref="rulesets/codesize.xml">
+        <exclude name="CyclomaticComplexity" />
+        <exclude name="ExcessiveClassComplexity" />
+        <exclude name="ExcessiveClassLength" />
+        <exclude name="ExcessiveMethodLength" />
+        <exclude name="ExcessivePublicCount" />
+        <exclude name="NPathComplexity" />
+        <exclude name="TooManyFields" />
+        <exclude name="TooManyMethods" />
+        <exclude name="TooManyPublicMethods" />
+    </rule>
+</ruleset>
diff --git a/app/code/core/Mage/Adminhtml/Block/Customer/Online/Grid/Renderer/Ip.php b/app/code/core/Mage/Adminhtml/Block/Customer/Online/Grid/Renderer/Ip.php
index 996d3e325d1..de121ef7477 100644
--- a/app/code/core/Mage/Adminhtml/Block/Customer/Online/Grid/Renderer/Ip.php
+++ b/app/code/core/Mage/Adminhtml/Block/Customer/Online/Grid/Renderer/Ip.php
@@ -27,6 +27,9 @@
  */
 class Mage_Adminhtml_Block_Customer_Online_Grid_Renderer_Ip extends Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Abstract
 {
+    /**
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
+     */
     public function render(Varien_Object $row)
     {
         /**
diff --git a/app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column/Renderer/Ip.php b/app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column/Renderer/Ip.php
index fd4575f11ef..e855420de39 100644
--- a/app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column/Renderer/Ip.php
+++ b/app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column/Renderer/Ip.php
@@ -32,6 +32,8 @@ class Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Ip extends Mage_Adminhtml
      *
      * @param Varien_Object $row
      * @return string
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function render(Varien_Object $row)
     {
diff --git a/app/code/core/Mage/Backup/Helper/Data.php b/app/code/core/Mage/Backup/Helper/Data.php
index 40dc1cdff69..efb2d23a301 100644
--- a/app/code/core/Mage/Backup/Helper/Data.php
+++ b/app/code/core/Mage/Backup/Helper/Data.php
@@ -207,6 +207,8 @@ public function turnOnMaintenanceMode()
 
     /**
      * Turn off store maintenance mode
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function turnOffMaintenanceMode()
     {
diff --git a/app/code/core/Mage/Backup/Model/Backup.php b/app/code/core/Mage/Backup/Model/Backup.php
index e169ed8cf72..31f67d6a9b5 100644
--- a/app/code/core/Mage/Backup/Model/Backup.php
+++ b/app/code/core/Mage/Backup/Model/Backup.php
@@ -168,6 +168,8 @@ public function setFile(&$content)
      * @todo rewrite to Varien_IO, but there no possibility read part of files.
      * @return string
      * @throws Mage_Backup_Exception
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function &getFile()
     {
@@ -227,6 +229,8 @@ public function deleteFile()
      *
      * @param bool $write
      * @return $this
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function open($write = false)
     {
@@ -312,6 +316,8 @@ public function write($string)
      * Close open backup file
      *
      * @return $this
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function close()
     {
diff --git a/app/code/core/Mage/Catalog/Model/Api2/Product/Image/Rest/Admin/V1.php b/app/code/core/Mage/Catalog/Model/Api2/Product/Image/Rest/Admin/V1.php
index 22eb73e8fa0..83fc1109880 100644
--- a/app/code/core/Mage/Catalog/Model/Api2/Product/Image/Rest/Admin/V1.php
+++ b/app/code/core/Mage/Catalog/Model/Api2/Product/Image/Rest/Admin/V1.php
@@ -34,6 +34,8 @@ class Mage_Catalog_Model_Api2_Product_Image_Rest_Admin_V1 extends Mage_Catalog_M
      * @throws Mage_Api2_Exception
      * @param array $data
      * @return string|void
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _create(array $data)
     {
diff --git a/app/code/core/Mage/Catalog/Model/Product/Attribute/Media/Api.php b/app/code/core/Mage/Catalog/Model/Product/Attribute/Media/Api.php
index e931e2c2ba4..47d32f1f782 100644
--- a/app/code/core/Mage/Catalog/Model/Product/Attribute/Media/Api.php
+++ b/app/code/core/Mage/Catalog/Model/Product/Attribute/Media/Api.php
@@ -111,6 +111,8 @@ public function info($productId, $file, $store = null, $identifierType = null)
      * @param string|null $identifierType
      * @return string
      * @throws Mage_Api_Exception
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function create($productId, $data, $store = null, $identifierType = null)
     {
@@ -202,6 +204,8 @@ public function create($productId, $data, $store = null, $identifierType = null)
      * @param string|null $identifierType
      * @return bool
      * @throws Mage_Api_Exception
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function update($productId, $file, $data, $store = null, $identifierType = null)
     {
diff --git a/app/code/core/Mage/Catalog/Model/Product/Option/Type/File.php b/app/code/core/Mage/Catalog/Model/Product/Option/Type/File.php
index 05dd2f627d4..35c11efba6c 100644
--- a/app/code/core/Mage/Catalog/Model/Product/Option/Type/File.php
+++ b/app/code/core/Mage/Catalog/Model/Product/Option/Type/File.php
@@ -617,6 +617,8 @@ public function prepareOptionValueForRequest($optionValue)
      * Quote item to order item copy process
      *
      * @return $this
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function copyQuoteToOrder()
     {
@@ -798,6 +800,8 @@ protected function _getUploadMaxFilesize()
      *
      * @param string $ini_key php.ini Var name
      * @return int Setting value
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _getBytesIniValue($ini_key)
     {
diff --git a/app/code/core/Mage/Cms/Model/Wysiwyg/Images/Storage.php b/app/code/core/Mage/Cms/Model/Wysiwyg/Images/Storage.php
index 0194b755ea4..c4b0b70b90c 100644
--- a/app/code/core/Mage/Cms/Model/Wysiwyg/Images/Storage.php
+++ b/app/code/core/Mage/Cms/Model/Wysiwyg/Images/Storage.php
@@ -100,6 +100,8 @@ public function getDirsCollection($path)
      * @param string $path Parent directory path
      * @param string $type Type of storage, e.g. image, media etc.
      * @return Varien_Data_Collection_Filesystem
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function getFilesCollection($path, $type = null)
     {
diff --git a/app/code/core/Mage/Core/Controller/Varien/Front.php b/app/code/core/Mage/Core/Controller/Varien/Front.php
index 0b593631e5b..8f27b67934b 100644
--- a/app/code/core/Mage/Core/Controller/Varien/Front.php
+++ b/app/code/core/Mage/Core/Controller/Varien/Front.php
@@ -327,6 +327,8 @@ protected function _processRewriteUrl($url)
      * By default this feature is enabled in configuration.
      *
      * @param Mage_Core_Controller_Request_Http $request
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _checkBaseUrl($request)
     {
diff --git a/app/code/core/Mage/Core/Helper/Data.php b/app/code/core/Mage/Core/Helper/Data.php
index d546293881d..88268a44dd2 100644
--- a/app/code/core/Mage/Core/Helper/Data.php
+++ b/app/code/core/Mage/Core/Helper/Data.php
@@ -335,6 +335,8 @@ public function getStoreId($store = null)
      * @param string $string
      * @param bool $german
      * @return false|string
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function removeAccents($string, $german = false)
     {
@@ -763,6 +765,8 @@ public function uniqHash($prefix = '')
      * @param callable $beforeMergeCallback
      * @param array|string $extensionsFilter
      * @return bool|string
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function mergeFiles(
         array $srcFiles,
diff --git a/app/code/core/Mage/Core/Model/Config/Options.php b/app/code/core/Mage/Core/Model/Config/Options.php
index ba2f4afc3ba..7a84d5353d4 100644
--- a/app/code/core/Mage/Core/Model/Config/Options.php
+++ b/app/code/core/Mage/Core/Model/Config/Options.php
@@ -263,6 +263,8 @@ public function getExportDir()
     /**
      * @param string $dir
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function createDirIfNotExists($dir)
     {
diff --git a/app/code/core/Mage/Core/Model/Date.php b/app/code/core/Mage/Core/Model/Date.php
index f204e1659e1..b98f4e2bef7 100644
--- a/app/code/core/Mage/Core/Model/Date.php
+++ b/app/code/core/Mage/Core/Model/Date.php
@@ -67,6 +67,8 @@ protected function _getConfigTimezone()
      *
      * @param  string $timezone
      * @return int offset between timezone and gmt
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function calculateOffset($timezone = null)
     {
diff --git a/app/code/core/Mage/Core/Model/Design/Package.php b/app/code/core/Mage/Core/Model/Design/Package.php
index 3c3b4dc68d4..184b9238f50 100644
--- a/app/code/core/Mage/Core/Model/Design/Package.php
+++ b/app/code/core/Mage/Core/Model/Design/Package.php
@@ -659,6 +659,8 @@ protected function _checkUserAgentAgainstRegexps($regexpsConfigPath)
      * @param array $rules - design exception rules
      * @param string $regexpsConfigPath
      * @return bool|string
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public static function getPackageByUserAgent(array $rules, $regexpsConfigPath = 'path_mock')
     {
diff --git a/app/code/core/Mage/Core/Model/File/Storage/Abstract.php b/app/code/core/Mage/Core/Model/File/Storage/Abstract.php
index f1a7a564ed2..a96c473cd46 100644
--- a/app/code/core/Mage/Core/Model/File/Storage/Abstract.php
+++ b/app/code/core/Mage/Core/Model/File/Storage/Abstract.php
@@ -63,6 +63,8 @@ public function getMediaBaseDirectory()
      *
      * @param  string $path
      * @return array
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function collectFileInfo($path)
     {
diff --git a/app/code/core/Mage/Core/Model/Locale.php b/app/code/core/Mage/Core/Model/Locale.php
index bf28e957e59..3eb1b107bb7 100644
--- a/app/code/core/Mage/Core/Model/Locale.php
+++ b/app/code/core/Mage/Core/Model/Locale.php
@@ -586,6 +586,8 @@ public function utcDate($store, $date, $includeTime = false, $format = null)
      *
      * @param   mixed $store
      * @return  int
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function storeTimeStamp($store = null)
     {
diff --git a/app/code/core/Mage/Core/Model/Resource/File/Storage/File.php b/app/code/core/Mage/Core/Model/Resource/File/Storage/File.php
index b9d566e98b7..bc58299ac2f 100644
--- a/app/code/core/Mage/Core/Model/Resource/File/Storage/File.php
+++ b/app/code/core/Mage/Core/Model/Resource/File/Storage/File.php
@@ -113,6 +113,8 @@ public function getStorageData($dir = '')
      *
      * @param  string $dir
      * @return $this
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function clear($dir = '')
     {
@@ -161,6 +163,8 @@ protected function _getIgnoredFiles()
      *
      * @param  array $dir
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function saveDir($dir)
     {
@@ -192,6 +196,8 @@ public function saveDir($dir)
      * @param  bool $overwrite
      * @return bool true if file written, otherwise false
      * @throws Mage_Core_Exception
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function saveFile($filePath, $content, $overwrite = false)
     {
@@ -236,6 +242,8 @@ public function saveFile($filePath, $content, $overwrite = false)
      *
      * @param string $filePath
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function lockCreateFile($filePath)
     {
@@ -279,6 +287,8 @@ public function lockCreateFile($filePath)
      * Unlock, close and remove a locked file (in case the file could not be read from remote storage)
      *
      * @param string $filePath
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function removeLockedFile($filePath)
     {
diff --git a/app/code/core/Mage/Core/functions.php b/app/code/core/Mage/Core/functions.php
index 0dce97d3794..cc4b27d9a7c 100644
--- a/app/code/core/Mage/Core/functions.php
+++ b/app/code/core/Mage/Core/functions.php
@@ -203,6 +203,8 @@ function mageCoreErrorHandler($errno, $errstr, $errfile, $errline)
  * @param bool $html
  * @param bool $showFirst
  * @return string|void
+ *
+ * @SuppressWarnings(PHPMD.ErrorControlOperator)
  */
 function mageDebugBacktrace($return = false, $html = true, $showFirst = false)
 {
@@ -240,6 +242,8 @@ function mageSendErrorFooter()
 
 /**
  * @param string $path
+ *
+ * @SuppressWarnings(PHPMD.ErrorControlOperator)
  */
 function mageDelTree($path)
 {
@@ -296,6 +300,8 @@ function mageParseCsv($string, $delimiter = ",", $enclosure = '"', $escape = '\\
 /**
  * @param string $dir
  * @return bool
+ *
+ * @SuppressWarnings(PHPMD.ErrorControlOperator)
  */
 function is_dir_writeable($dir)
 {
diff --git a/app/code/core/Mage/Eav/Model/Attribute/Data/Image.php b/app/code/core/Mage/Eav/Model/Attribute/Data/Image.php
index 89e3685349f..8e7423bd575 100644
--- a/app/code/core/Mage/Eav/Model/Attribute/Data/Image.php
+++ b/app/code/core/Mage/Eav/Model/Attribute/Data/Image.php
@@ -34,6 +34,8 @@ class Mage_Eav_Model_Attribute_Data_Image extends Mage_Eav_Model_Attribute_Data_
      *
      * @param array $value
      * @return array
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _validateByRules($value)
     {
diff --git a/app/code/core/Mage/Install/Model/Installer/Console.php b/app/code/core/Mage/Install/Model/Installer/Console.php
index 997a9cf07a7..a8e29cc409b 100644
--- a/app/code/core/Mage/Install/Model/Installer/Console.php
+++ b/app/code/core/Mage/Install/Model/Installer/Console.php
@@ -316,6 +316,8 @@ protected function _prepareData()
      * Install Magento
      *
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function install()
     {
diff --git a/app/code/core/Mage/Media/Model/File/Image.php b/app/code/core/Mage/Media/Model/File/Image.php
index 4033d1fccaf..52dd3371d85 100644
--- a/app/code/core/Mage/Media/Model/File/Image.php
+++ b/app/code/core/Mage/Media/Model/File/Image.php
@@ -203,6 +203,8 @@ public function saveAs(Mage_Media_Model_Image $object, $extension = null)
      *
      * @param Mage_Media_Model_Image $object
      * @return Varien_Object
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function getDimensions(Mage_Media_Model_Image $object)
     {
diff --git a/app/code/core/Mage/Paypal/Model/Report/Settlement.php b/app/code/core/Mage/Paypal/Model/Report/Settlement.php
index 62e8a22f22b..2952da552be 100644
--- a/app/code/core/Mage/Paypal/Model/Report/Settlement.php
+++ b/app/code/core/Mage/Paypal/Model/Report/Settlement.php
@@ -187,6 +187,8 @@ protected function _beforeSave()
      *
      * @param array $config SFTP credentials
      * @return int Number of report rows that were fetched and saved successfully
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function fetchAndSave($config)
     {
diff --git a/app/code/core/Mage/Sales/Model/Order/Pdf/Abstract.php b/app/code/core/Mage/Sales/Model/Order/Pdf/Abstract.php
index ffc5586b733..cb7b966240c 100644
--- a/app/code/core/Mage/Sales/Model/Order/Pdf/Abstract.php
+++ b/app/code/core/Mage/Sales/Model/Order/Pdf/Abstract.php
@@ -86,6 +86,8 @@ abstract public function getPdf();
      * @param  Zend_Pdf_Resource_Font $font
      * @param  float $fontSize Font size in points
      * @return float
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function widthForStringUsingFontSize($string, $font, $fontSize)
     {
diff --git a/app/code/core/Mage/Sales/controllers/DownloadController.php b/app/code/core/Mage/Sales/controllers/DownloadController.php
index 0ad8ffd372f..0069e1b76d4 100644
--- a/app/code/core/Mage/Sales/controllers/DownloadController.php
+++ b/app/code/core/Mage/Sales/controllers/DownloadController.php
@@ -78,6 +78,8 @@ protected function _validateFilePath($info)
      *
      * @param string $filePath
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _processDatabaseFile($filePath)
     {
diff --git a/lib/Mage/Archive/Abstract.php b/lib/Mage/Archive/Abstract.php
index 234c60ee527..f1e73c1cd9c 100644
--- a/lib/Mage/Archive/Abstract.php
+++ b/lib/Mage/Archive/Abstract.php
@@ -50,6 +50,8 @@ protected function _writeFile($destination, $data)
      * @param string $source
      * @return string
      * @throws Mage_Exception
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _readFile($source)
     {
diff --git a/lib/Mage/Archive/Helper/File.php b/lib/Mage/Archive/Helper/File.php
index 46e8efd143c..876691d0272 100644
--- a/lib/Mage/Archive/Helper/File.php
+++ b/lib/Mage/Archive/Helper/File.php
@@ -161,6 +161,8 @@ public function eof()
 
     /**
      * Close file
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function close()
     {
@@ -175,6 +177,8 @@ public function close()
      *
      * @param string $mode
      * @throws Mage_Exception
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _open($mode)
     {
@@ -190,6 +194,8 @@ protected function _open($mode)
      *
      * @param string $data
      * @throws Mage_Exception
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _write($data)
     {
diff --git a/lib/Mage/Archive/Helper/File/Bz.php b/lib/Mage/Archive/Helper/File/Bz.php
index c9ee4030a18..12ad051953e 100644
--- a/lib/Mage/Archive/Helper/File/Bz.php
+++ b/lib/Mage/Archive/Helper/File/Bz.php
@@ -33,6 +33,8 @@ class Mage_Archive_Helper_File_Bz extends Mage_Archive_Helper_File
      *
      * @throws Mage_Exception
      * @param string $mode
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _open($mode)
     {
@@ -48,6 +50,8 @@ protected function _open($mode)
      *
      * @throws Mage_Exception
      * @param $data
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _write($data)
     {
diff --git a/lib/Mage/Archive/Helper/File/Gz.php b/lib/Mage/Archive/Helper/File/Gz.php
index 87811c5c083..27572584783 100644
--- a/lib/Mage/Archive/Helper/File/Gz.php
+++ b/lib/Mage/Archive/Helper/File/Gz.php
@@ -43,6 +43,8 @@ public function __construct($filePath)
 
     /**
      * @see Mage_Archive_Helper_File::_open()
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _open($mode)
     {
@@ -55,6 +57,8 @@ protected function _open($mode)
 
     /**
      * @see Mage_Archive_Helper_File::_write()
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _write($data)
     {
diff --git a/lib/Mage/Archive/Tar.php b/lib/Mage/Archive/Tar.php
index 1e56cd21533..00174da7c8e 100644
--- a/lib/Mage/Archive/Tar.php
+++ b/lib/Mage/Archive/Tar.php
@@ -412,6 +412,8 @@ protected function _composeHeader($long = false)
      * @param string $destination path to file is unpacked
      * @return array list of files
      * @throws Mage_Exception
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _unpackCurrentTar($destination)
     {
diff --git a/lib/Mage/Autoload/Simple.php b/lib/Mage/Autoload/Simple.php
index c7448bc9f6a..f221957f767 100644
--- a/lib/Mage/Autoload/Simple.php
+++ b/lib/Mage/Autoload/Simple.php
@@ -36,6 +36,9 @@ public static function register()
         spl_autoload_register([self::instance(), 'autoload']);
     }
 
+    /**
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
+     */
     public function autoload($class)
     {
         $classFile = str_replace(' ', DIRECTORY_SEPARATOR, ucwords(str_replace('_', ' ', $class)));
diff --git a/lib/Mage/Backup/Db.php b/lib/Mage/Backup/Db.php
index 81bc10604ae..57f1b8c3a98 100644
--- a/lib/Mage/Backup/Db.php
+++ b/lib/Mage/Backup/Db.php
@@ -31,6 +31,8 @@ class Mage_Backup_Db extends Mage_Backup_Abstract
      * Implements Rollback functionality for Db
      *
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function rollback()
     {
diff --git a/lib/Mage/Backup/Filesystem.php b/lib/Mage/Backup/Filesystem.php
index c7dcffd5225..fb70018cfdd 100644
--- a/lib/Mage/Backup/Filesystem.php
+++ b/lib/Mage/Backup/Filesystem.php
@@ -93,6 +93,8 @@ public function rollback()
      *
      * @throws Mage_Exception
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function create()
     {
diff --git a/lib/Mage/Backup/Filesystem/Helper.php b/lib/Mage/Backup/Filesystem/Helper.php
index dbf03ac7b8c..0d4991cb067 100644
--- a/lib/Mage/Backup/Filesystem/Helper.php
+++ b/lib/Mage/Backup/Filesystem/Helper.php
@@ -66,6 +66,8 @@ class Mage_Backup_Filesystem_Helper
      * @param array $skipPaths
      * @param bool $removeRoot
      * @throws Mage_Exception
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function rm($path, $skipPaths = [], $removeRoot = false)
     {
diff --git a/lib/Mage/Backup/Filesystem/Rollback/Ftp.php b/lib/Mage/Backup/Filesystem/Rollback/Ftp.php
index 153076c3a9c..bc8af609907 100644
--- a/lib/Mage/Backup/Filesystem/Rollback/Ftp.php
+++ b/lib/Mage/Backup/Filesystem/Rollback/Ftp.php
@@ -81,6 +81,8 @@ protected function _initFtpClient()
      * Perform ftp validation. Check whether ftp account provided points to current magento installation
      *
      * @throws Mage_Exception
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _validateFtp()
     {
@@ -121,6 +123,8 @@ protected function _unpackSnapshot($tmpDir)
     /**
      * @throws Mage_Exception
      * @return string
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _createTmpDir()
     {
diff --git a/lib/Mage/Backup/Snapshot.php b/lib/Mage/Backup/Snapshot.php
index d525188c7c0..e3f993b2c48 100644
--- a/lib/Mage/Backup/Snapshot.php
+++ b/lib/Mage/Backup/Snapshot.php
@@ -126,6 +126,8 @@ protected function _getDbBackupManager()
      * Remove Db backup after added it to the snapshot
      *
      * @return $this
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _removeDbBackup()
     {
diff --git a/lib/Mage/Cache/Backend/File.php b/lib/Mage/Cache/Backend/File.php
index 7fe99fc8105..5edcc371203 100644
--- a/lib/Mage/Cache/Backend/File.php
+++ b/lib/Mage/Cache/Backend/File.php
@@ -264,6 +264,8 @@ public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = [])
      * Return an array of stored tags
      *
      * @return array Array of stored tags (string)
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function getTags()
     {
@@ -375,8 +377,9 @@ public function touch($id, $extraLifetime)
      *
      * @param  string $file  Cache file
      * @param  bool $withData
-     *
      * @return array|bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _getCache($file, $withData)
     {
@@ -481,6 +484,8 @@ protected function _path($id, $parts = false)
      *
      * @throws Zend_Cache_Exception
      * @return boolean In case of success returns true
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _clean($dir, $mode = Zend_Cache::CLEANING_MODE_ALL, $tags = [])
     {
@@ -648,6 +653,8 @@ protected function _tagFile($id)
      * Return the complete directory path where tags are stored
      *
      * @return string Complete directory path
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _tagPath()
     {
@@ -671,6 +678,8 @@ protected function _tagPath()
      * @param string|resource $tag
      *
      * @return array
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _getTagIds($tag)
     {
@@ -744,6 +753,8 @@ protected function _updateIdsTags($ids, $tags, $mode)
      * @param  string $string String to put in file
      *
      * @return boolean In case of success returns true
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _filePutContents($file, $string)
     {
@@ -760,6 +771,8 @@ protected function _filePutContents($file, $string)
      *
      * @param string $id cache id
      * @return boolean true
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _recursiveMkdirAndChmod($id)
     {
diff --git a/lib/Mage/DB/Mysqli.php b/lib/Mage/DB/Mysqli.php
index 9ac94f32d6b..1b24c37efc3 100644
--- a/lib/Mage/DB/Mysqli.php
+++ b/lib/Mage/DB/Mysqli.php
@@ -73,6 +73,8 @@ public function __construct()
      * @param string $db
      * @param int $port
      * @return mixed
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function connect($host, $user, $paswd, $db, $port = self::DEFAULT_PORT)
     {
diff --git a/lib/Mage/HTTP/Client/Socket.php b/lib/Mage/HTTP/Client/Socket.php
index 96fe7ac17d3..c7e7d0144a3 100644
--- a/lib/Mage/HTTP/Client/Socket.php
+++ b/lib/Mage/HTTP/Client/Socket.php
@@ -130,6 +130,8 @@ public function connect($host, $port = 80)
 
     /**
      * Disconnect
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function disconnect()
     {
@@ -385,6 +387,8 @@ protected function processResponseHeaders()
 
     /**
      * Process response body
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function processResponseBody()
     {
@@ -437,6 +441,8 @@ public function getStatus()
      * @param string $method
      * @param string $uri
      * @param array $params
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function makeRequest($method, $uri, $params = [])
     {
diff --git a/lib/Mage/System/Dirs.php b/lib/Mage/System/Dirs.php
index 021670f0d7b..c0dc554073f 100644
--- a/lib/Mage/System/Dirs.php
+++ b/lib/Mage/System/Dirs.php
@@ -20,6 +20,9 @@
  */
 class Mage_System_Dirs
 {
+    /**
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
+     */
     public static function rm($dirname)
     {
         if (is_array($dirname)) {
@@ -70,6 +73,9 @@ public static function rm($dirname)
         return true;
     }
 
+    /**
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
+     */
     public static function mkdirStrict($path, $recursive = true, $mode = 0777)
     {
         $exists = file_exists($path);
diff --git a/lib/Mage/System/Ftp.php b/lib/Mage/System/Ftp.php
index 2e0e9c0384a..6be7032e572 100644
--- a/lib/Mage/System/Ftp.php
+++ b/lib/Mage/System/Ftp.php
@@ -53,6 +53,8 @@ protected function checkConnected()
      *
      * @param string $name
      * @return string
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function mdkir($name)
     {
@@ -66,6 +68,8 @@ public function mdkir($name)
      * @param string $path
      * @param int $mode
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function mkdirRecursive($path, $mode = 0777)
     {
@@ -95,6 +99,8 @@ public function mkdirRecursive($path, $mode = 0777)
      * @param string $password
      * @throws Exception on invalid login credentials
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function login($login = "anonymous", $password = "test@gmail.com")
     {
@@ -112,6 +118,8 @@ public function login($login = "anonymous", $password = "test@gmail.com")
      * @param string $string
      * @throws Exception
      * @return array
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function validateConnectionString($string)
     {
@@ -163,6 +171,8 @@ public function connect($string, $timeout = 900)
      * @param int $mode  FTP_BINARY | FTP_ASCII
      * @param int $startPos
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function fput($remoteFile, $handle, $mode = FTP_BINARY, $startPos = 0)
     {
@@ -212,6 +222,8 @@ public function getcwd()
      *
      * @param string $cmd
      * @return mixed
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function raw($cmd)
     {
@@ -284,6 +296,8 @@ public function download($remote, $local, $ftpMode = FTP_BINARY)
      *
      * @param bool $pasv
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function pasv($pasv)
     {
@@ -295,6 +309,8 @@ public function pasv($pasv)
      * Close FTP connection
      *
      * @return void
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function close()
     {
@@ -309,6 +325,8 @@ public function close()
      * @param $mode
      * @param $remoteFile
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function chmod($mode, $remoteFile)
     {
@@ -321,6 +339,8 @@ public function chmod($mode, $remoteFile)
      *
      * @param string $dir
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function chdir($dir)
     {
@@ -332,6 +352,8 @@ public function chdir($dir)
      * ftp_cdup wrapper
      *
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function cdup()
     {
@@ -347,6 +369,8 @@ public function cdup()
      * @param int $fileMode         FTP_BINARY | FTP_ASCII
      * @param int $resumeOffset
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function get($localFile, $remoteFile, $fileMode = FTP_BINARY, $resumeOffset = 0)
     {
@@ -360,6 +384,8 @@ public function get($localFile, $remoteFile, $fileMode = FTP_BINARY, $resumeOffs
      *
      * @param string $dir
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function nlist($dir = "/")
     {
@@ -374,6 +400,8 @@ public function nlist($dir = "/")
      * @param string $dir
      * @param bool $recursive
      * @return mixed
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function rawlist($dir = "/", $recursive = false)
     {
@@ -493,6 +521,8 @@ public function correctFilePath($str)
      *
      * @param string $file
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function delete($file)
     {
diff --git a/lib/Magento/Autoload/Simple.php b/lib/Magento/Autoload/Simple.php
index ba161f801a5..990045e9088 100644
--- a/lib/Magento/Autoload/Simple.php
+++ b/lib/Magento/Autoload/Simple.php
@@ -38,6 +38,9 @@ public static function register()
         spl_autoload_register([self::instance(), 'autoload']);
     }
 
+    /**
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
+     */
     public function autoload($class)
     {
         $classFile = str_replace(' ', DIRECTORY_SEPARATOR, ucwords(str_replace('_', ' ', $class)));
diff --git a/lib/Varien/Autoload.php b/lib/Varien/Autoload.php
index 27f33fff559..be33494ccd2 100644
--- a/lib/Varien/Autoload.php
+++ b/lib/Varien/Autoload.php
@@ -54,6 +54,8 @@ public static function register()
      * Load class source code
      *
      * @param string $class
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function autoload($class)
     {
diff --git a/lib/Varien/Db/Adapter/Mysqli.php b/lib/Varien/Db/Adapter/Mysqli.php
index 622c61ee65f..a638de02fd5 100644
--- a/lib/Varien/Db/Adapter/Mysqli.php
+++ b/lib/Varien/Db/Adapter/Mysqli.php
@@ -29,6 +29,8 @@ class Varien_Db_Adapter_Mysqli extends Zend_Db_Adapter_Mysqli
      *
      * @return void
      * @throws Zend_Db_Adapter_Mysqli_Exception
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _connect()
     {
diff --git a/lib/Varien/File/Uploader.php b/lib/Varien/File/Uploader.php
index 28bb2431629..7ff010f217e 100644
--- a/lib/Varien/File/Uploader.php
+++ b/lib/Varien/File/Uploader.php
@@ -529,6 +529,9 @@ private function _setUploadFileId($fileId)
         }
     }
 
+    /**
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
+     */
     private function _createDestinationFolder($destinationFolder)
     {
         if (!$destinationFolder) {
diff --git a/lib/Varien/Image/Adapter/Abstract.php b/lib/Varien/Image/Adapter/Abstract.php
index 2be36b71d6a..5eeb09e56aa 100644
--- a/lib/Varien/Image/Adapter/Abstract.php
+++ b/lib/Varien/Image/Adapter/Abstract.php
@@ -147,6 +147,9 @@ abstract public function watermark($watermarkImage, $positionX = 0, $positionY =
 
     abstract public function checkDependencies();
 
+    /**
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
+     */
     public function getMimeType()
     {
         if ($this->_fileMimeType) {
diff --git a/lib/Varien/Image/Adapter/Gd2.php b/lib/Varien/Image/Adapter/Gd2.php
index 8c49ed63596..1da6514c378 100644
--- a/lib/Varien/Image/Adapter/Gd2.php
+++ b/lib/Varien/Image/Adapter/Gd2.php
@@ -45,6 +45,8 @@ public function __construct()
 
     /**
      * Destroy object image on shutdown
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function destruct()
     {
diff --git a/lib/Varien/Io/File.php b/lib/Varien/Io/File.php
index 72fe656e516..cf3c2a9b5fa 100644
--- a/lib/Varien/Io/File.php
+++ b/lib/Varien/Io/File.php
@@ -118,6 +118,8 @@ public function destruct()
      * @param string $fileName
      * @param string $mode
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function streamOpen($fileName, $mode = 'w+', $chmod = 0666)
     {
@@ -180,6 +182,8 @@ public function streamUnlock()
      *
      * @param int $length
      * @return bool|string
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function streamRead($length = 1024)
     {
@@ -196,6 +200,8 @@ public function streamRead($length = 1024)
      * Gets line from file pointer and parse for CSV fields
      *
      * @return array|false|null
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function streamReadCsv($delimiter = ',', $enclosure = '"')
     {
@@ -210,6 +216,8 @@ public function streamReadCsv($delimiter = ',', $enclosure = '"')
      *
      * @param string $str
      * @return bool|int
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function streamWrite($str)
     {
@@ -226,6 +234,8 @@ public function streamWrite($str)
      * @param string $delimiter
      * @param string $enclosure
      * @return bool|int
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function streamWriteCsv(array $row, $delimiter = ',', $enclosure = '"')
     {
@@ -241,6 +251,8 @@ public function streamWriteCsv(array $row, $delimiter = ',', $enclosure = '"')
      * Set chmod on a file
      *
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function streamClose()
     {
@@ -265,6 +277,8 @@ public function streamClose()
      * @param string $part the part of statistic
      * @param mixed $default default value for part
      * @return array|bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function streamStat($part = null, $default = null)
     {
@@ -338,6 +352,8 @@ public function close()
      * @param int $mode
      * @param boolean $recursive
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function mkdir($dir, $mode = 0777, $recursive = true)
     {
@@ -360,6 +376,8 @@ public function mkdir($dir, $mode = 0777, $recursive = true)
      *
      * @param string $dir
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function rmdir($dir, $recursive = false)
     {
@@ -378,6 +396,8 @@ public function rmdir($dir, $recursive = false)
      * @param string $dir
      * @param bool $recursive
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public static function rmdirRecursive($dir, $recursive = true)
     {
@@ -415,6 +435,8 @@ public function pwd()
      * @param string $dir
      * @return boolean
      * @throws Exception
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function cd($dir)
     {
@@ -436,6 +458,8 @@ public function cd($dir)
      * @param string $filename
      * @param string|resource $dest
      * @return boolean|string
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function read($filename, $dest = null)
     {
@@ -488,6 +512,8 @@ public function write($filename, $src, $mode = null)
      *
      * @param string|resource $src
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _isValidSource($src)
     {
@@ -510,6 +536,8 @@ protected function _isValidSource($src)
      * @param string $filename
      * @throws Varien_Io_Exception
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _isFilenameWriteable($filename)
     {
@@ -542,6 +570,8 @@ protected function _isFilenameWriteable($filename)
      *
      * @param string $src
      * @return bool
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     protected function _checkSrcIsFile($src)
     {
@@ -560,6 +590,8 @@ protected function _checkSrcIsFile($src)
      * @param string|resource $src
      *
      * @return int
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function filePutContent($filename, $src)
     {
@@ -574,6 +606,9 @@ public function filePutContent($filename, $src)
         return $result;
     }
 
+    /**
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
+     */
     public function fileExists($file, $onlyFile = true)
     {
         if ($this->_cwd) {
@@ -589,6 +624,9 @@ public function fileExists($file, $onlyFile = true)
         return $result;
     }
 
+    /**
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
+     */
     public function isWriteable($path)
     {
         if ($this->_cwd) {
@@ -651,6 +689,8 @@ public function checkAndCreateFolder($folder, $mode = 0777)
      *
      * @param string $filename
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function rm($filename)
     {
@@ -670,6 +710,8 @@ public function rm($filename)
      * @param string $src
      * @param string $dest
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function mv($src, $dest)
     {
@@ -689,6 +731,8 @@ public function mv($src, $dest)
      * @param string $src
      * @param string $dest
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function cp($src, $dest)
     {
@@ -708,6 +752,8 @@ public function cp($src, $dest)
      * @param string $filename
      * @param int $mode
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function chmod($filename, $mode)
     {
diff --git a/lib/Varien/Io/Ftp.php b/lib/Varien/Io/Ftp.php
index 38ff287185f..4ba7fd35a48 100644
--- a/lib/Varien/Io/Ftp.php
+++ b/lib/Varien/Io/Ftp.php
@@ -75,6 +75,8 @@ class Varien_Io_Ftp extends Varien_Io_Abstract
      *
      * @param array $args
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function open(array $args = [])
     {
@@ -145,6 +147,8 @@ public function open(array $args = [])
      * Close a connection
      *
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function close()
     {
@@ -159,6 +163,8 @@ public function close()
      * @param int $mode
      * @param boolean $recursive
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function mkdir($dir, $mode = 0777, $recursive = true)
     {
@@ -170,6 +176,8 @@ public function mkdir($dir, $mode = 0777, $recursive = true)
      *
      * @param string $dir
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function rmdir($dir, $recursive = false)
     {
@@ -180,6 +188,8 @@ public function rmdir($dir, $recursive = false)
      * Get current working directory
      *
      * @return string
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function pwd()
     {
@@ -191,6 +201,8 @@ public function pwd()
      *
      * @param string $dir
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function cd($dir)
     {
@@ -236,6 +248,8 @@ public function read($filename, $dest = null)
      * @param string $filename
      * @param string|resource $src filename, string data or source stream
      * @return int|boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function write($filename, $src, $mode = null)
     {
@@ -266,6 +280,8 @@ public function write($filename, $src, $mode = null)
      *
      * @param string $filename
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function rm($filename)
     {
@@ -278,6 +294,8 @@ public function rm($filename)
      * @param string $src
      * @param string $dest
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function mv($src, $dest)
     {
@@ -290,12 +308,17 @@ public function mv($src, $dest)
      * @param string $filename
      * @param int $mode
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function chmod($filename, $mode)
     {
         return @ftp_chmod($this->_conn, $mode, $filename);
     }
 
+    /**
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
+     */
     public function ls($grep = null)
     {
         $ls = @ftp_nlist($this->_conn, '.');
diff --git a/lib/Varien/Simplexml/Config.php b/lib/Varien/Simplexml/Config.php
index b8ffdc61ca0..03f2a542723 100644
--- a/lib/Varien/Simplexml/Config.php
+++ b/lib/Varien/Simplexml/Config.php
@@ -140,6 +140,8 @@ public function getNode($path = null)
      *
      * @param string $xpath
      * @return Varien_Simplexml_Element[]|false
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function getXpath($xpath)
     {
diff --git a/lib/Varien/Simplexml/Config/Cache/File.php b/lib/Varien/Simplexml/Config/Cache/File.php
index 823aa6c2e8f..b4f521a250a 100644
--- a/lib/Varien/Simplexml/Config/Cache/File.php
+++ b/lib/Varien/Simplexml/Config/Cache/File.php
@@ -49,6 +49,8 @@ public function setKey($key)
      * Try to load configuration cache from file
      *
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function load()
     {
@@ -85,6 +87,8 @@ public function load()
      * Try to save configuration cache to file
      *
      * @return boolean
+     *
+     * @SuppressWarnings(PHPMD.ErrorControlOperator)
      */
     public function save()
     {