diff --git a/src/Exceptions/ValidationException.php b/src/Exceptions/ValidationException.php
new file mode 100644
index 0000000..8c9ea26
--- /dev/null
+++ b/src/Exceptions/ValidationException.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace Aryess\PhpMatrixSdk\Exceptions;
+
+/**
+ * Simple exception to differentiate validation exception from other exceptions
+ *
+ * @package Aryess\PhpMatrixSdk\Exceptions
+ */
+class ValidationException extends \Exception {}
\ No newline at end of file
diff --git a/src/MatrixHttpApi.php b/src/MatrixHttpApi.php
new file mode 100644
index 0000000..cb9f5e4
--- /dev/null
+++ b/src/MatrixHttpApi.php
@@ -0,0 +1,5 @@
+<?php
+
+namespace Aryess\PhpMatrixSdk;
+
+class MatrixHttpApi {}
\ No newline at end of file
diff --git a/src/Util.php b/src/Util.php
new file mode 100644
index 0000000..9561c8a
--- /dev/null
+++ b/src/Util.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace Aryess\PhpMatrixSdk;
+
+use Aryess\PhpMatrixSdk\Exceptions\ValidationException;
+
+class Util {
+
+    /**
+     * Check if provided roomId is valid
+     *
+     * @param string $roomId
+     * @throws ValidationException
+     */
+    public static function checkRoomId(string $roomId) {
+        if(strpos($roomId, '!') !== 0) {
+            throw new ValidationException("RoomIDs start with !");
+        }
+
+        if(strpos($roomId, ':') === false) {
+            throw new ValidationException("RoomIDs must have a domain component, seperated by a :");
+        }
+    }
+
+    /**
+     * Check if provided userId is valid
+     *
+     * @param string $userId
+     * @throws ValidationException
+     */
+    public static function checkUserId(string $userId) {
+        if(strpos($userId, '@') !== 0) {
+            throw new ValidationException("UserIDs start with @");
+        }
+
+        if(strpos($userId, ':') === false) {
+            throw new ValidationException("UserIDs must have a domain component, seperated by a :");
+        }
+    }
+}
\ No newline at end of file