diff --git a/src/Dibi/Drivers/MySqlDriver.php b/src/Dibi/Drivers/MySqlDriver.php
index 7d6dcd06..7b8fc926 100644
--- a/src/Dibi/Drivers/MySqlDriver.php
+++ b/src/Dibi/Drivers/MySqlDriver.php
@@ -33,7 +33,9 @@ class MySqlDriver implements Dibi\Driver, Dibi\ResultDriver
 	use Dibi\Strict;
 
 	const ERROR_ACCESS_DENIED = 1045;
+
 	const ERROR_DUPLICATE_ENTRY = 1062;
+
 	const ERROR_DATA_TRUNCATED = 1265;
 
 	/** @var resource|null */
diff --git a/src/Dibi/Drivers/MySqliDriver.php b/src/Dibi/Drivers/MySqliDriver.php
index 860856d8..4a01a1cc 100644
--- a/src/Dibi/Drivers/MySqliDriver.php
+++ b/src/Dibi/Drivers/MySqliDriver.php
@@ -34,7 +34,9 @@ class MySqliDriver implements Dibi\Driver, Dibi\ResultDriver
 	use Dibi\Strict;
 
 	const ERROR_ACCESS_DENIED = 1045;
+
 	const ERROR_DUPLICATE_ENTRY = 1062;
+
 	const ERROR_DATA_TRUNCATED = 1265;
 
 	/** @var \mysqli|null */
diff --git a/src/Dibi/Drivers/OracleDriver.php b/src/Dibi/Drivers/OracleDriver.php
index 9c2fbfec..7282972f 100644
--- a/src/Dibi/Drivers/OracleDriver.php
+++ b/src/Dibi/Drivers/OracleDriver.php
@@ -42,6 +42,7 @@ class OracleDriver implements Dibi\Driver, Dibi\ResultDriver, Dibi\Reflector
 
 	/** @var string  Date and datetime format */
 	private $fmtDate;
+
 	private $fmtDateTime;
 
 	/** @var int|false Number of affected rows */
diff --git a/src/Dibi/Drivers/Sqlite3Driver.php b/src/Dibi/Drivers/Sqlite3Driver.php
index 3b6586b4..e129c727 100644
--- a/src/Dibi/Drivers/Sqlite3Driver.php
+++ b/src/Dibi/Drivers/Sqlite3Driver.php
@@ -38,10 +38,12 @@ class Sqlite3Driver implements Dibi\Driver, Dibi\ResultDriver
 
 	/** @var string  Date and datetime format */
 	private $fmtDate;
+
 	private $fmtDateTime;
 
 	/** @var string  character encoding */
 	private $dbcharset;
+
 	private $charset;
 
 
diff --git a/src/Dibi/Drivers/SqlsrvDriver.php b/src/Dibi/Drivers/SqlsrvDriver.php
index 1800d89b..63a5ebdf 100644
--- a/src/Dibi/Drivers/SqlsrvDriver.php
+++ b/src/Dibi/Drivers/SqlsrvDriver.php
@@ -8,7 +8,6 @@
 namespace Dibi\Drivers;
 
 use Dibi;
-use Dibi\Connection;
 use Dibi\Helpers;
 
 
diff --git a/src/Dibi/Reflection/Column.php b/src/Dibi/Reflection/Column.php
index 917593a1..47e0d3ab 100644
--- a/src/Dibi/Reflection/Column.php
+++ b/src/Dibi/Reflection/Column.php
@@ -8,7 +8,6 @@
 namespace Dibi\Reflection;
 
 use Dibi;
-use Dibi\Type;
 
 
 /**