diff --git a/lib/Doctrine/Connection.php b/lib/Doctrine/Connection.php
index 73a7e5fa..479fcfd9 100644
--- a/lib/Doctrine/Connection.php
+++ b/lib/Doctrine/Connection.php
@@ -52,6 +52,8 @@
  * @version     $Revision$
  * @author      Konsta Vesterinen <kvesteri@cc.hut.fi>
  * @author      Lukas Smith <smith@pooteeweet.org> (MDB2 library)
+ *
+ * @property Doctrine_Export $export
  */
 abstract class Doctrine_Connection extends Doctrine_Configurable implements Countable, IteratorAggregate, Serializable
 {
@@ -241,11 +243,9 @@ public function isConnected()
     }
 
     /**
-     * getOptions
-     *
      * Get array of all options
      *
-     * @return void
+     * @return array<string, mixed>
      */
     public function getOptions()
     {
@@ -253,14 +253,9 @@ public function getOptions()
     }
 
     /**
-     * getOption
-     *
-     * Retrieves option
-     *
-     * @param string $option
-     * @return void
+     * @return null|mixed
      */
-    public function getOption($option)
+    public function getOption(string $option)
     {
         if (isset($this->options[$option])) {
             return $this->options[$option];
@@ -268,14 +263,11 @@ public function getOption($option)
     }
 
     /**
-     * setOption
-     *
      * Set option value
      *
-     * @param string $option
-     * @return void
+     * @return mixed
      */
-    public function setOption($option, $value)
+    public function setOption(string $option, $value)
     {
       return $this->options[$option] = $value;
     }
@@ -1545,8 +1537,8 @@ public function dropDatabase()
      * which is always guaranteed to exist. Mysql: 'mysql', PostgreSQL: 'postgres', etc.
      * This value is set in the Doctrine_Export_{DRIVER} classes if required
      *
-     * @param string $info
-     * @return void
+     * @param array $info
+     * @return Doctrine_Connection
      */
     public function getTmpConnection($info)
     {
@@ -1569,7 +1561,7 @@ public function getTmpConnection($info)
         $username = $this->getOption('username');
         $password = $this->getOption('password');
 
-        $conn = $this->getManager()->openConnection(array($pdoDsn, $username, $password), 'doctrine_tmp_connection', false);
+        $conn = $this->getManager()->openConnection([$pdoDsn, $username, $password], 'doctrine_tmp_connection', false);
         $conn->setOption('username', $username);
         $conn->setOption('password', $password);
 
diff --git a/lib/Doctrine/Manager.php b/lib/Doctrine/Manager.php
index a2b08944..9c07f8d3 100644
--- a/lib/Doctrine/Manager.php
+++ b/lib/Doctrine/Manager.php
@@ -274,7 +274,7 @@ public static function connection($adapter = null, $name = null)
     /**
      * Opens a new connection and saves it to Doctrine_Manager->connections
      *
-     * @param PDO|Doctrine_Adapter_Interface $adapter   database driver
+     * @param array|string|PDO|Doctrine_Adapter_Interface $adapter   database driver
      * @param string $name                              name of the connection, if empty numeric key is used
      * @throws Doctrine_Manager_Exception               if trying to bind a connection with an existing name
      * @throws Doctrine_Manager_Exception               if trying to open connection for unknown driver
@@ -292,17 +292,17 @@ public function openConnection($adapter, $name = null, $setCurrent = true)
             if ( ! isset($adapter[0])) {
                 throw new Doctrine_Manager_Exception('Empty data source name given.');
             }
-            $e = explode(':', $adapter[0]);
+            $schema = explode(':', $adapter[0]);
 
-            if ($e[0] == 'uri') {
-                $e[0] = 'odbc';
+            if ($schema[0] === 'uri') {
+                $schema[0] = 'odbc';
             }
 
             $parts['dsn']    = $adapter[0];
-            $parts['scheme'] = $e[0];
-            $parts['user']   = (isset($adapter[1])) ? $adapter[1] : null;
-            $parts['pass']   = (isset($adapter[2])) ? $adapter[2] : null;
-            $driverName = $e[0];
+            $parts['scheme'] = $schema[0];
+            $parts['user']   = $adapter[1] ?? null;
+            $parts['pass']   = $adapter[2] ?? null;
+            $driverName = $schema[0];
             $adapter = $parts;
         } else {
             $parts = $this->parseDsn($adapter);
@@ -329,7 +329,7 @@ public function openConnection($adapter, $name = null, $setCurrent = true)
                 return $this->_connections[$name];
             }
         } else {
-            $name = $this->_index;
+            $name = (string) $this->_index;
             $this->_index++;
         }
 
@@ -352,11 +352,23 @@ public function openConnection($adapter, $name = null, $setCurrent = true)
     /**
      * Parse a pdo style dsn in to an array of parts
      *
-     * @param array $dsn An array of dsn information
-     * @return array The array parsed
+     * @param string $dsn An array of dsn information
+     * @return array{
+     *     dsn: string,
+     *     scheme: string,
+     *     host: ?string,
+     *     user: ?string,
+     *     pass: ?string,
+     *     password: ?string,
+     *     port: ?string,
+     *     path: ?string,
+     *     query: ?string,
+     *     fragment: ?string,
+     *     unix_socket: ?string,
+     *   }
      * @todo package:dbal
      */
-    public function parsePdoDsn($dsn)
+    public function parsePdoDsn($dsn): array
     {
         $parts = array();
 
@@ -401,7 +413,7 @@ public function parsePdoDsn($dsn)
      * @param string $dsn
      * @return array $parts
      */
-    protected function _buildDsnPartsArray($dsn)
+    protected function _buildDsnPartsArray(string $dsn)
     {
         // fix sqlite dsn so that it will parse correctly
         $dsn = str_replace("////", "/", $dsn);
@@ -437,7 +449,7 @@ protected function _buildDsnPartsArray($dsn)
      * @return array Parsed contents of DSN
      * @todo package:dbal
      */
-    public function parseDsn($dsn)
+    public function parseDsn(string $dsn)
     {
         $parts = $this->_buildDsnPartsArray($dsn);
 
diff --git a/lib/Doctrine/Migration.php b/lib/Doctrine/Migration.php
index 0208ce54..c62caed3 100644
--- a/lib/Doctrine/Migration.php
+++ b/lib/Doctrine/Migration.php
@@ -187,7 +187,7 @@ public function loadMigrationClass($name, $path = null)
         }
 
         if ($class === false) {
-            return false;
+            return;
         }
 
         if (empty($this->_migrationClasses)) {
@@ -307,15 +307,13 @@ public function getNextMigrationClassVersion()
      *
      * @param  integer $to       Version to migrate to
      * @param  boolean $dryRun   Whether or not to run the migrate process as a dry run
-     * @return integer $to       Version number migrated to
+     * @return bool              True if the migration succeeded, false otherwise
      * @throws Doctrine_Exception
      */
     public function migrate($to = null, $dryRun = false)
     {
         $this->clearErrors();
-
         $this->_createMigrationTable();
-
         $this->_connection->beginTransaction();
 
         try {
diff --git a/tests/DoctrineTest/Doctrine_UnitTestCase.php b/tests/DoctrineTest/Doctrine_UnitTestCase.php
index 3fa7bcbc..c158d5da 100644
--- a/tests/DoctrineTest/Doctrine_UnitTestCase.php
+++ b/tests/DoctrineTest/Doctrine_UnitTestCase.php
@@ -216,6 +216,7 @@ public function init()
             }
         }
     }
+
     public function prepareTables() {
         foreach($this->tables as $name) {
             $name = ucwords($name);
@@ -230,6 +231,7 @@ public function prepareTables() {
         $this->conn->export->exportClasses($this->tables);
         $this->objTable = $this->connection->getTable('User');
     }
+
     public function prepareData()
     {
         $groups = new Doctrine_Collection($this->connection->getTable('Group'));