diff --git a/core/lib/Drupal/Core/Database/Database.php b/core/lib/Drupal/Core/Database/Database.php
index 705fbbc..be6ce71 100644
--- a/core/lib/Drupal/Core/Database/Database.php
+++ b/core/lib/Drupal/Core/Database/Database.php
@@ -191,7 +191,7 @@
    * Sets the active connection to the specified key.
    *
    * @param string $key
-   * Database connection key in settings.php which should be set as active
+   * Database connection key in settings.php which should be set as active.
    *
    * @return string|null
    *   The previous database connection key.
@@ -360,7 +360,7 @@
    *   The database target to open.
    *
    * @return \Drupal\Core\Database\Connection
-   * Connection object to perform database queries
+   * Connection object to perform database queries.
    *
    * @throws \Drupal\Core\Database\ConnectionNotDefinedException
    * @throws \Drupal\Core\Database\DriverNotSpecifiedException
diff --git a/core/lib/Drupal/Core/Database/Schema.php b/core/lib/Drupal/Core/Database/Schema.php
index 3801254..c7fdef2 100644
--- a/core/lib/Drupal/Core/Database/Schema.php
+++ b/core/lib/Drupal/Core/Database/Schema.php
@@ -197,7 +197,7 @@
 
   /**
    * @param \Drupal\Core\Database\Driver\Sqlite\Connection $connection
-   * SQLite object for DatabaseConnection
+   * SQLite object for DatabaseConnection.
    *
    */
   public function __construct($connection) {
@@ -206,7 +206,7 @@ public function __construct($connection) {
   }
 
   /**
-   * Implements the magic __clone function
+   * Implements the magic __clone function.
    *
    * @return string
    */
@@ -234,8 +234,8 @@ public function nextPlaceholder() {
    * Get information about the table name and schema from the prefix.
    *
    * @param string $table
-   *   Name of table to look prefix up for. Defaults to 'default' because that is the
-   *   default key for prefix.
+   *   Name of table to look prefix up for. Defaults to 'default' because that
+   *   is the default key for prefix.
    * @param bool $add_prefix
    *   TRUE, if the given table name should be prefixed. FALSE, otherwise.
    *
diff --git a/core/lib/Drupal/Core/Database/Statement.php b/core/lib/Drupal/Core/Database/Statement.php
index 5138495..34eb92c 100644
--- a/core/lib/Drupal/Core/Database/Statement.php
+++ b/core/lib/Drupal/Core/Database/Statement.php
@@ -38,7 +38,7 @@ class Statement extends \PDOStatement implements StatementInterface {
 
   /**
    * @param \Drupal\Core\Database\Connection $dbh
-   * Connection object to perform database queries
+   * Connection object to perform database queries.
    */
   protected function __construct(Connection $dbh) {
     $this->dbh = $dbh;
diff --git a/core/lib/Drupal/Core/Database/StatementPrefetch.php b/core/lib/Drupal/Core/Database/StatementPrefetch.php
index 597bdd4..1f5cf51 100644
--- a/core/lib/Drupal/Core/Database/StatementPrefetch.php
+++ b/core/lib/Drupal/Core/Database/StatementPrefetch.php
@@ -137,16 +137,16 @@ class StatementPrefetch implements \Iterator, StatementInterface {
 
   /**
    * @param \PDO $dbh
-   * Php Database object
+   * Php Database object.
    *
    * @param \Drupal\Core\Database\Connection $connection
-   * Connection object to perform Database operations
+   * Connection object to perform Database operations.
    *
    * @param string $query
-   * Query string to fetch data
+   * Query string to fetch data.
    *
    * @param array $driver_options
-   * Connection Driver specific options
+   * Connection Driver specific options.
    */
   public function __construct(\PDO $dbh, Connection $connection, $query, array $driver_options = array()) {
     $this->dbh = $dbh;