diff --git a/src/Database.php b/src/Database.php
new file mode 100644
index 0000000..8ec9164
--- /dev/null
+++ b/src/Database.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+final class Database
+{
+    private static ?PDO $pdo = null;
+
+    public static function connect(): PDO
+    {
+        if (self::$pdo !== null) {
+            return self::$pdo;
+        }
+
+        $root = dirname(__DIR__);
+        $dsn  = 'sqlite:' . $root . '/database/api_tube.sqlite';
+
+        self::$pdo = new PDO($dsn);
+        self::$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+        self::$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
+        self::$pdo->exec('PRAGMA foreign_keys = ON');
+
+        $schema = file_get_contents($root . '/database/schema.sql');
+        self::$pdo->exec($schema);
+
+        return self::$pdo;
+    }
+}