diff --git a/classes/connection_manager.php b/classes/connection_manager.php
index b4c09b8..01f4a7f 100644
--- a/classes/connection_manager.php
+++ b/classes/connection_manager.php
@@ -48,6 +48,7 @@ final class Connection_Manager {
 
 	/**
 	 * Private constructor to prevent multiple instances
+	 * @codeCoverageIgnore
 	 */
 	private function __construct() {}
 
@@ -55,6 +56,7 @@ final class Connection_Manager {
 
 	/**
 	 * Private clone method to prevent cloning
+	 * @codeCoverageIgnore
 	 */
 	private function __clone() {}
 
@@ -62,6 +64,7 @@ final class Connection_Manager {
 
 	/**
 	 * Make sure serialize/deseriaze doesn't work
+	 * @codeCoverageIgnore
 	 * @throws DomainException
 	 */
 	private function __wakeup()
@@ -80,10 +83,12 @@ final class Connection_Manager {
 	public static function get_instance()
 	{
 
+		// @codeCoverageIgnoreStart
 		if (self::$instance === null)
 		{
 			self::$instance = new self();
 		}
+		// @codeCoverageIgnoreEnd
 
 		return self::$instance;
 	}
@@ -212,12 +217,15 @@ final class Connection_Manager {
 	 */
 	private function create_dsn($dbtype, $params)
 	{
+		// Add the driver type to the dsn
+		$dsn = ($dbtype !== 'firebird' && $dbtype !== 'sqlite')
+			? strtolower($dbtype).':'
+			: '';
+
 		if ($dbtype === 'firebird') $dsn = "{$params->host}:{$params->file}";
 		elseif ($dbtype === 'sqlite') $dsn = $params->file;
 		else
 		{
-			$dsn = strtolower($dbtype) . ':';
-			
 			if ( ! empty($params->database))
 			{
 				$dsn .= "dbname={$params->database}";
diff --git a/common.php b/common.php
index 5a80b79..7958455 100644
--- a/common.php
+++ b/common.php
@@ -5,6 +5,7 @@
  * Free Query Builder / Database Abstraction Layer
  *
  * @package		Query
+ * @subpackage	Core
  * @author		Timothy J. Warren
  * @copyright	Copyright (c) 2012 - 2014
  * @link 		https://github.com/aviat4ion/Query
@@ -15,8 +16,6 @@
 
 /**
  * Global functions that don't really fit anywhere else
- *
- * @package Query
  */
 
 // --------------------------------------------------------------------------
@@ -27,7 +26,6 @@ if ( ! function_exists('do_include'))
 	 * Bulk directory loading workaround for use
 	 * with array_map and glob
 	 *
-	 * @subpackage Core
 	 * @param string $path
 	 * @return void
 	 */
@@ -44,7 +42,6 @@ if ( ! function_exists('mb_trim'))
 	/**
 	 * Multibyte-safe trim function
 	 *
-	 * @subpackage Core
 	 * @param string $string
 	 * @return string
 	 */
@@ -59,7 +56,6 @@ if ( ! function_exists('mb_trim'))
 /**
  * Filter out db rows into one array
  *
- * @subpackage Core
  * @param array $array
  * @param mixed $index
  * @return array
@@ -81,7 +77,6 @@ function db_filter($array, $index)
 /**
  * Connection function
  *
- * @subpackage Core
  * @param mixed $params
  * @return Query_Builder
  */
@@ -99,7 +94,7 @@ function Query($params = '')
 		// Otherwise, return a new connection
 		return $cmanager->connect($params);
 	}
-
+// @codeCoverageIgnoreStart
 }
-
+// @codeCoverageIgnoreEnd
 // End of common.php
\ No newline at end of file
diff --git a/tests/databases/pgsql/PgSQLQBTest.php b/tests/databases/pgsql/PgSQLQBTest.php
index 3f33fed..bf6a1a2 100644
--- a/tests/databases/pgsql/PgSQLQBTest.php
+++ b/tests/databases/pgsql/PgSQLQBTest.php
@@ -24,7 +24,7 @@ class PgSQLQBTest extends QBTest {
 		{
 			$this->markTestSkipped("Postgres extension for PDO not loaded");
 		}
- 		
+
  		// Attempt to connect, if there is a test config file
 		if (is_file(QTEST_DIR . "/settings.json"))
 		{
@@ -57,9 +57,9 @@ class PgSQLQBTest extends QBTest {
 	{
 		$this->assertTrue(in_array('pgsql', PDO::getAvailableDrivers()));
 	}
-	
+
 	// --------------------------------------------------------------------------
-	
+
 	public function testQueryExplain()
 	{
 		$query = $this->db->select('id, key as k, val')
@@ -67,9 +67,9 @@ class PgSQLQBTest extends QBTest {
 			->where('id >', 1)
 			->where('id <', 900)
 			->get('create_test', 2, 1);
-			
+
 		$res = $query->fetchAll(PDO::FETCH_ASSOC);
-		
+
 		$expected = array (
 		  array (
 		    'QUERY PLAN' => 'Limit  (cost=6.41..10.64 rows=2 width=68)',
@@ -93,7 +93,12 @@ class PgSQLQBTest extends QBTest {
 		    'QUERY PLAN' => '              Index Cond: ((create_test.id > 1) AND (create_test.id < 900))',
 		  ),
 		);
-		
+
 		$this->assertEqual($expected, $res);
 	}
+
+	public function testBackupStructure()
+	{
+		$this->assertEquals('', $this->db->util->backup_structure());
+	}
 }
\ No newline at end of file