diff --git a/core/includes/config.inc b/core/includes/config.inc
index 1562ff0..a1d221e 100644
--- a/core/includes/config.inc
+++ b/core/includes/config.inc
@@ -181,12 +181,13 @@ function config_sync_get_changes(StorageInterface $source_storage, StorageInterf
  *
  * For example, for the config file core/modules/system/config/system.site.yml:
  * @code
- *   name: Site-Install
- *   mail: admin@example.com
- *   slogan: 'This is an example site'
+ *   name: Drupal
+ *   mail: ''
+ *   slogan: ''
  *   page:
- *     403: 'pages/403'
- *     404: 'pages/404'
+ *     403: ''
+ *     404: ''
+ *     front: user
  * @endcode
  *
  * The metadata in core/modules/system/meta/system.site.yml:
@@ -211,6 +212,9 @@ function config_sync_get_changes(StorageInterface $source_storage, StorageInterf
  *     404:
  *       .definition:
  *         label: 'Default 404 (not found) page'
+ *     front:
+ *       .definition:
+ *         label: 'Default front page'
  * @endcode
  *
  * Elements that don't have an explicit type will default to the type 'string'
@@ -242,7 +246,7 @@ function config_sync_get_changes(StorageInterface $source_storage, StorageInterf
  *
  * For every element, meta/user.mail.%.yml is read as specified by the
  * 'elements name' list settings:
- * @end
+ * @code
  *   .definition:
  *     label: 'Mail text'
  *   subject:
@@ -332,18 +336,18 @@ function config_sync_get_changes(StorageInterface $source_storage, StorageInterf
  *         type: 'integer'
  * @endcode
  *
- * @see Drupal\Core\TypedData\TypedDataManager::create()
- * @see Drupal\Core\Config\Metadata\ElementBase
- * @see Drupal\Core\Config\Metadata\ListElement
+ * @see \Drupal\Core\TypedData\TypedDataManager::create()
+ * @see \Drupal\Core\Config\Metadata\ElementBase
+ * @see \Drupal\Core\Config\Metadata\ListElement
  *
  * @param string $name
  *   The name or key of the configuration object, the same as passed to
  *   config().
  *
- * @return Drupal\Core\Config\Metadata\MetadataLookup
+ * @return \Drupal\Core\Config\Metadata\MetadataLookup
  *   A metadata array.
  *
- * @see Drupal\Core\Config\Metadata\ElementInterface::getMetadata()
+ * @see \Drupal\Core\Config\Metadata\ElementInterface::getMetadata()
  */
 function config_metadata($name) {
   return drupal_container()->get('config.metadata')->offsetGet($name);
@@ -355,7 +359,7 @@ function config_metadata($name) {
  * @param string $name
  *   The name of the configuration object to retrieve.
  *
- * @return Drupal\Core\Config\Metadata\TypedConfig
+ * @return \Drupal\Core\Config\Metadata\TypedConfig
  *   A configuration wrapper object.
  */
 function config_wrapper($name) {
diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index 5327a77..fd2d7ba 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -1681,10 +1681,10 @@ function install_import_translations_remaining(&$install_state) {
 /**
  * Creates configuration translations.
  *
- * @param $install_state
+ * @param array $install_state
  *   An array of information about the current installation state.
  *
- * @return
+ * @return array
  *   The batch definition, if there are configuration objects to update.
  */
 function install_update_configuration_translations(&$install_state) {
diff --git a/core/lib/Drupal/Core/Config/InstallStorage.php b/core/lib/Drupal/Core/Config/InstallStorage.php
index ad3476c..931c1f3 100644
--- a/core/lib/Drupal/Core/Config/InstallStorage.php
+++ b/core/lib/Drupal/Core/Config/InstallStorage.php
@@ -15,7 +15,7 @@
 class InstallStorage extends FileStorage {
 
   /**
-   * Folder map indexed by configuration name
+   * Folder map indexed by configuration name.
    *
    * @var array
    */
@@ -160,4 +160,5 @@ public function getComponentNames($type, $list) {
   protected function getComponentFolder($type, $name) {
     return drupal_get_path($type, $name) . '/config';
   }
+
 }
diff --git a/core/lib/Drupal/Core/Config/Metadata/ConfigElement.php b/core/lib/Drupal/Core/Config/Metadata/ConfigElement.php
index 742cccc..b3c4479 100644
--- a/core/lib/Drupal/Core/Config/Metadata/ConfigElement.php
+++ b/core/lib/Drupal/Core/Config/Metadata/ConfigElement.php
@@ -19,6 +19,7 @@
  * type of nested properties.
  */
 class ConfigElement extends ElementBase implements ComplexDataInterface {
+
   /**
    * Implements Drupal\Core\TypedData\ComplexDataInterface::get().
    */
diff --git a/core/lib/Drupal/Core/Config/Metadata/ElementBase.php b/core/lib/Drupal/Core/Config/Metadata/ElementBase.php
index d92f574..81b75cd 100644
--- a/core/lib/Drupal/Core/Config/Metadata/ElementBase.php
+++ b/core/lib/Drupal/Core/Config/Metadata/ElementBase.php
@@ -70,7 +70,7 @@ protected function getElement($key) {
   /**
    * Gets the built metadata array for a child element.
    *
-   * @param $key
+   * @param string $key
    *   Key from the configuration data array.
    *
    * @return array
diff --git a/core/lib/Drupal/Core/Config/Metadata/TypedConfig.php b/core/lib/Drupal/Core/Config/Metadata/TypedConfig.php
index ef4e3cc..1964ee1 100644
--- a/core/lib/Drupal/Core/Config/Metadata/TypedConfig.php
+++ b/core/lib/Drupal/Core/Config/Metadata/TypedConfig.php
@@ -60,13 +60,14 @@ public function setData(array $data) {
   }
 
   /**
-   * Overrides Drupal\Core\Config::get()
+   * Overrides Drupal\Core\Config::get().
    *
    * Unlike the get() method of the base configuration object, this one returns
    * a typed data object instead of raw configuration data.
    *
-   * @return \Drupal\Core\TypedData\TypedDataInterface
-   *   The data that was requested.
+   * @return \Drupal\Core\TypedData\TypedDataInterface|null
+   *   The data that was requested or NULL if the base was not a ListInterface
+   *   or a ComplexDataInterface.
    */
   public function get($key = '') {
     $element = $this->getBase();
diff --git a/core/lib/Drupal/Core/Config/Metadata/TypedConfigFactory.php b/core/lib/Drupal/Core/Config/Metadata/TypedConfigFactory.php
index 76d97d5..aa416ad 100644
--- a/core/lib/Drupal/Core/Config/Metadata/TypedConfigFactory.php
+++ b/core/lib/Drupal/Core/Config/Metadata/TypedConfigFactory.php
@@ -15,6 +15,8 @@
 class TypedConfigFactory {
 
   /**
+   * The configuration factory.
+   *
    * @var \Drupal\Core\Config\ConfigFactory
    */
   protected $configFactory;
@@ -32,7 +34,10 @@ function __construct(ConfigFactory $config_factory) {
    * Returns configuration wrapper object to access data as typed properties.
    *
    * @param string $name
+   *   Name of the data.
+   *
    * @return TypedConfig
+   *   The configuration wrapper as an object.
    */
   function get($name) {
     return new TypedConfig($name, $this->configFactory->get($name)->load()->get());
diff --git a/core/modules/config/lib/Drupal/config/Tests/ConfigMetadataTest.php b/core/modules/config/lib/Drupal/config/Tests/ConfigMetadataTest.php
index ceec0fc..947603a 100644
--- a/core/modules/config/lib/Drupal/config/Tests/ConfigMetadataTest.php
+++ b/core/modules/config/lib/Drupal/config/Tests/ConfigMetadataTest.php
@@ -14,6 +14,7 @@
  * Tests Metadata for configuration objects.
  */
 class ConfigMetadataTest extends WebTestBase {
+
   /**
    * Modules to enable.
    *
diff --git a/core/modules/locale/lib/Drupal/locale/LocaleTypedConfig.php b/core/modules/locale/lib/Drupal/locale/LocaleTypedConfig.php
index 8dd3119..7c11d20 100644
--- a/core/modules/locale/lib/Drupal/locale/LocaleTypedConfig.php
+++ b/core/modules/locale/lib/Drupal/locale/LocaleTypedConfig.php
@@ -56,7 +56,8 @@ class LocaleTypedConfig extends TypedConfig implements TranslatableInterface {
    * @param array $data
    *   The configuration data.
    * @param \Drupal\locale\StringStorageInterface $localeStorage;
-   *   (optional) Locale string storage object that will be used for translations.
+   *   (optional) Locale string storage object that will be used for
+   *   translations.
    */
   public function __construct($name, $data, StringStorageInterface $localeStorage = NULL) {
     parent::__construct($name, $data);
@@ -213,7 +214,7 @@ public function translateElement($element, $options) {
    * Unlike regular t() translations, strings will be added to the source
    * tables only if this is marked as default data.
    *
-   * @param $langcode
+   * @param string $langcode
    *   Language code to translate to.
    * @param string $source
    *   The source string.
@@ -254,4 +255,5 @@ protected function translateString($langcode, $source, $context) {
     }
     return FALSE;
   }
+
 }
diff --git a/core/modules/locale/lib/Drupal/locale/Tests/LocaleConfigTranslationTest.php b/core/modules/locale/lib/Drupal/locale/Tests/LocaleConfigTranslationTest.php
index 23b0ff6..453b212 100644
--- a/core/modules/locale/lib/Drupal/locale/Tests/LocaleConfigTranslationTest.php
+++ b/core/modules/locale/lib/Drupal/locale/Tests/LocaleConfigTranslationTest.php
@@ -15,6 +15,7 @@
  * Tests Metadata for configuration objects.
  */
 class LocaleConfigTranslationTest extends WebTestBase {
+
   /**
    * Modules to enable.
    *
diff --git a/core/modules/locale/locale.bulk.inc b/core/modules/locale/locale.bulk.inc
index 2043e86..637f92f 100644
--- a/core/modules/locale/locale.bulk.inc
+++ b/core/modules/locale/locale.bulk.inc
@@ -533,6 +533,14 @@ function locale_translate_batch_import($filepath, $options, &$context) {
 
 /**
  * Refresh translations after importing strings.
+ *
+ * @param array $options
+ *   An array with options that can have the following elements:
+ *   - 'refresh_configuration': Whether or not to refresh Configuration strings
+ *     after the import. Optional, defaults to FALSE.
+ *
+ * @param array $context
+ *   Contains a list of strings updated and information about the progress.
  */
 function locale_translate_batch_refresh($options, &$context) {
   if (!isset($context['sandbox']['refresh'])) {
@@ -695,6 +703,9 @@ function locale_translate_delete_translation_files($langcode) {
  * @param array $components
  *   (optional) Array of component lists indexed by type. If not present or it
  *   is an empty array, it will update all components.
+ *
+ * @return array
+ *   The batch definition.
  */
 function locale_config_batch_update_components($options, $components = array()) {
   $langcodes = isset($options['langcode']) ? array($options['langcode']) : array_keys(locale_translatable_language_list());
@@ -714,6 +725,9 @@ function locale_config_batch_update_components($options, $components = array())
  *   An array with options that can have the following elements:
  *   - 'finish_feedback': Whether or not to give feedback to the user when the
  *     batch is finished. Optional, defaults to TRUE.
+ *
+ * @return array
+ *   The batch definition.
  */
 function locale_config_batch_build($names, $langcodes, $options = array()) {
   $options += array('finish_feedback' => TRUE);
@@ -737,6 +751,10 @@ function locale_config_batch_build($names, $langcodes, $options = array()) {
 /**
  * Perform configuration translation refresh as a batch step.
  *
+ * @param array $name
+ *   Name of configuration object to update.
+ * @param array $langcodes
+ *   (optional) Array of language codes to update. Defaults to all languages.
  * @param $context
  *   Contains a list of files imported.
  */
@@ -752,6 +770,11 @@ function locale_config_batch_refresh_name($name, $langcodes, &$context) {
 
 /**
  * Finished callback of system page locale import batch.
+ *
+ * @param bool $success
+ *   Information about the success of the batch import.
+ * @param array $results
+ *   Information about the results of the batch import.
  */
 function locale_config_batch_finished($success, $results) {
   if ($success) {
@@ -831,6 +854,7 @@ function locale_config_update_multiple($names, $langcodes = array()) {
  *   Default configuration data.
  * @param array $updated
  *   Current configuration data.
+ *
  * @return array
  *   The elements of default configuration that haven't changed.
  */
@@ -855,6 +879,9 @@ function _locale_config_data_compare($default, $updated) {
 
 /**
  * Delete configuration for uninstalled components.
+ *
+ * @param array $components
+ *   Array with string identifiers.
  */
 function locale_config_delete_components($components) {
   $names = _locale_config_component_names($components);