diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ecdf2d7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+vendor
+.idea
diff --git a/src/Database/Connection.php b/src/Database/Connection.php
index 790783f..fbd5bff 100644
--- a/src/Database/Connection.php
+++ b/src/Database/Connection.php
@@ -37,6 +37,12 @@ protected function run($query, $bindings, \Closure $callback)
         );
     }
 
+    /**
+     * Append SQL comments to the underlying query.
+     *
+     * @param string $query
+     * @return string
+     */
     private function appendSqlComments(string $query): string
     {
         static $configurationKey = 'google_sqlcommenter.include';
@@ -52,7 +58,7 @@ private function appendSqlComments(string $query): string
         if (config("{$configurationKey}.controller", true) && !empty($action['controller'])) {
             $comments['controller'] = explode("@", class_basename($action['controller']))[0];
         }
-        if (config("{$configurationKey}.action", true) && !empty($action and $action['controller'] && str_contains($action['controller'], '@'))) {
+        if (config("{$configurationKey}.action", true) && !empty($action) && !empty($action['controller']) && str_contains($action['controller'], '@')) {
             $comments['action'] = explode("@", class_basename($action['controller']))[1];
         }
         if (config("{$configurationKey}.route", true)) {
diff --git a/src/Opentelemetry.php b/src/Opentelemetry.php
index b793c48..d49da14 100644
--- a/src/Opentelemetry.php
+++ b/src/Opentelemetry.php
@@ -21,6 +21,11 @@
 
 class Opentelemetry
 {
+    /**
+     * Get the underlying Opentelemetry values.
+     *
+     * @return array
+     */
     public static function getOpentelemetryValues()
     {
         $carrier = [];
diff --git a/src/Utils.php b/src/Utils.php
index 387835a..900d1ff 100644
--- a/src/Utils.php
+++ b/src/Utils.php
@@ -19,6 +19,12 @@
 
 class Utils
 {
+    /**
+     * Format query comments.
+     *
+     * @param array $comments
+     * @return string
+     */
     public static function formatComments(array $comments): string
     {
         if (empty($comments)) {
@@ -34,6 +40,12 @@ public static function formatComments(array $comments): string
         ) . "*/";
     }
 
+    /**
+     * Encode URL.
+     *
+     * @param string $input
+     * @return string
+     */
     private static function customUrlEncode(string $input): string
     {
         $encodedString = urlencode($input);