Reorder and Added missing databases

src/Database/PostgreSQL.php

@@ -0,0 +1,19 @@
+<?php
+namespace ProVM\Database;
+
+use ProVM\Implement\Database;
+
+class PostgreSQL extends Database
+{
+    public function getDsn(): string
+    {
+        $dsn = ["pgsql:host={$this->getHost()}"];
+        if ($this->getPort()) {
+            $dsn []= "port={$this->getPort()}";
+        }
+        $dsn []= "dbname={$this->getName()}";
+        $dsn []= "user={$this->getUser()}";
+        $dsn []= "password={$this->getPassword()}";
+        return implode(';', $dsn);
+    }
+}