Add file docblocks to new DB files.

core/lib/Drupal/Core/Database/Connection.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Connection
+ */
+
 namespace Drupal\Core\Database;
 
 use Drupal\Core\Database\TransactionNoActiveException;

core/lib/Drupal/Core/Database/ConnectionNotDefinedException.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\ConnectionNotDefinedException
+ */
+
 namespace Drupal\Core\Database;
 
 use RuntimeException;

core/lib/Drupal/Core/Database/Database.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Database
+ */
+
 namespace Drupal\Core\Database;
 
 /**

core/lib/Drupal/Core/Database/Driver/mysql/Connection.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\mysql\Connection
+ */
+
 namespace Drupal\Core\Database\Driver\mysql;
 
 use Drupal\Core\Database\Database;

core/lib/Drupal/Core/Database/Driver/mysql/Delete.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\mysql\Delete
+ */
+
 namespace Drupal\Core\Database\Driver\mysql;
 
 use Drupal\Core\Database\Query\Delete as QueryDelete;

core/lib/Drupal/Core/Database/Driver/mysql/Insert.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\mysql\Insert
+ */
+
 namespace Drupal\Core\Database\Driver\mysql;
 
 use Drupal\Core\Database\Query\Insert as QueryInsert;

core/lib/Drupal/Core/Database/Driver/mysql/Install/Tasks.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\mysql\Install\Tasks
+ */
+
 namespace Drupal\Core\Database\Driver\mysql\Install;
 
 use Drupal\Core\Database\Install\Tasks as InstallTasks;

core/lib/Drupal/Core/Database/Driver/mysql/Merge.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\mysql\Merge
+ */
+
 namespace Drupal\Core\Database\Driver\mysql;
 
 use Drupal\Core\Database\Query\Merge as QueryMerge;

core/lib/Drupal/Core/Database/Driver/mysql/Schema.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\mysql\Schema
+ */
+
 namespace Drupal\Core\Database\Driver\mysql;
 
 use Drupal\Core\Database\Database;

core/lib/Drupal/Core/Database/Driver/mysql/Select.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\mysql\Select
+ */
+
 namespace Drupal\Core\Database\Driver\mysql;
 
 use Drupal\Core\Database\Query\Select as QuerySelect;

core/lib/Drupal/Core/Database/Driver/mysql/Transaction.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\mysql\Transaction
+ */
+
 namespace Drupal\Core\Database\Driver\mysql;
 
 use Drupal\Core\Database\Transaction as DatabaseTransaction;

core/lib/Drupal/Core/Database/Driver/mysql/Truncate.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\mysql\Truncate
+ */
+
 namespace Drupal\Core\Database\Driver\mysql;
 
 use Drupal\Core\Database\Query\Truncate as QueryTruncate;

core/lib/Drupal/Core/Database/Driver/mysql/Update.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\mysql\Update
+ */
+
 namespace Drupal\Core\Database\Driver\mysql;
 
 use Drupal\Core\Database\Query\Update as QueryUpdate;

core/lib/Drupal/Core/Database/Driver/pgsql/Connection.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\pgsql\Connection
+ */
+
 namespace Drupal\Core\Database\Driver\pgsql;
 
 use Drupal\Core\Database\Database;

core/lib/Drupal/Core/Database/Driver/pgsql/Delete.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\pgsql\Delete
+ */
+
 namespace Drupal\Core\Database\Driver\pgsql;
 
 use Drupal\Core\Database\Query\Delete as QueryDelete;

core/lib/Drupal/Core/Database/Driver/pgsql/Insert.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\pgsql\Insert
+ */
+
 namespace Drupal\Core\Database\Driver\pgsql;
 
 use Drupal\Core\Database\Database;

core/lib/Drupal/Core/Database/Driver/pgsql/Install/Tasks.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\pgsql\Install\Tasks
+ */
+
 namespace Drupal\Core\Database\Driver\pgsql\Install;
 
 use Drupal\Core\Database\Install\Tasks as InstallTasks;

core/lib/Drupal/Core/Database/Driver/pgsql/Merge.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\pgsql\Merge
+ */
+
 namespace Drupal\Core\Database\Driver\pgsql;
 
 use Drupal\Core\Database\Query\Merge as QueryMerge;

core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\pgsql\Schema
+ */
+
 namespace Drupal\Core\Database\Driver\pgsql;
 
 use Drupal\Core\Database\Database;

core/lib/Drupal/Core/Database/Driver/pgsql/Select.php

 <?php
 
+/**
+ * @file
+ * Definition of Drupal\Core\Database\Driver\pgsql\Select
+ */
+
 namespace Drupal\Core\Database\Driver\pgsql;
 
 use Drupal\Core\Database\Query\Select as QuerySelect;