diff --git a/composer.json b/composer.json
index dbe0c210d..8bd34a0a7 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,9 @@
     "ext-mcrypt": "*",
     "ext-cli": "*",
     "ext-soap": "*",
-    "ext-json": "*"
+    "ext-json": "*",
+    "ext-zip": "*",
+    "ext-mysqli": "*"
   },
   "config": {
     "platform": {
diff --git a/setup/backup.class.inc.php b/setup/backup.class.inc.php
index 25bdbeae3..cb1816814 100644
--- a/setup/backup.class.inc.php
+++ b/setup/backup.class.inc.php
@@ -235,18 +235,20 @@ if (class_exists('ZipArchive')) // The setup must be able to start even if the "
 		/**
 		 * Create a normalized backup name, depending on the current date/time and Database
 		 *
-		 * @param sNameSpec string Name and path, eventually containing itop placeholders + time formatting specs
+		 * @param string sMySQLBinDir  Name and path, eventually containing itop placeholders + time formatting specs
 		 */
 		public function SetMySQLBinDir($sMySQLBinDir)
 		{
 			$this->sMySQLBinDir = $sMySQLBinDir;
 		}
 
-		/**
-		 * Create a normalized backup name, depending on the current date/time and Database
-		 *
-		 * @param string sNameSpec Name and path, eventually containing itop placeholders + time formatting specs
-		 */
+        /**
+         * Create a normalized backup name, depending on the current date/time and Database
+         *
+         * @param string sNameSpec Name and path, eventually containing itop placeholders + time formatting specs
+         *
+         * @return string
+         */
 		public function MakeName($sNameSpec = "__DB__-%Y-%m-%d")
 		{
 			$sFileName = $sNameSpec;
@@ -646,7 +648,7 @@ if (class_exists('ZipArchive')) // The setup must be able to start even if the "
 		{
 			if (empty($sData))
 			{
-				return;
+				return '';
 			}
 
 			return ' --'.$sCliArgName.'='.self::EscapeShellArg($sData);
diff --git a/setup/tar.php b/setup/tar.php
index b07589715..72c074bc5 100644
--- a/setup/tar.php
+++ b/setup/tar.php
@@ -680,7 +680,7 @@ class ArchiveTar
 	 */
 	public function _error($p_message)
 	{
-		$this->error_object = $this->raiseError($p_message);
+		IssueLog::Error($p_message);
 	}
 
 	/**
@@ -688,7 +688,7 @@ class ArchiveTar
 	 */
 	public function _warning($p_message)
 	{
-		$this->error_object = $this->raiseError($p_message);
+		IssueLog::Warning($p_message);
 	}
 
 	/**