diff --git a/src/ExitException.php b/src/ExitException.php
index 327d417..78fa931 100644
--- a/src/ExitException.php
+++ b/src/ExitException.php
@@ -8,8 +8,8 @@ use Throwable;
  * quitter normalement, avec éventuellement un code d'erreur.
  */
 class ExitException extends UserException {
-  function __construct(int $exitcode=0, $user_message=null, Throwable $previous=null) {
-    parent::__construct($user_message, null, $exitcode, $previous);
+  function __construct(int $exitcode=0, $userMessage=null, Throwable $previous=null) {
+    parent::__construct($userMessage, null, $exitcode, $previous);
   }
 
   function isError(): bool {
diff --git a/src/UserException.php b/src/UserException.php
index 83e8966..4f4285a 100644
--- a/src/UserException.php
+++ b/src/UserException.php
@@ -75,12 +75,13 @@ class UserException extends RuntimeException {
     return implode("\n", $tbs);
   }
 
-  function __construct($user_message, $tech_message=null, $code=0, ?Throwable $previous=null) {
-    $this->userMessage = $user_message;
-    if ($tech_message === null) $tech_message = $user_message;
-    parent::__construct($tech_message, $code, $previous);
+  function __construct($userMessage, $techMessage=null, $code=0, ?Throwable $previous=null) {
+    $this->userMessage = $userMessage;
+    if ($techMessage === null) $techMessage = $userMessage;
+    parent::__construct($techMessage, $code, $previous);
   }
 
+  /** @var ?string */
   protected $userMessage;
 
   function getUserMessage(): ?string {
diff --git a/src/web/ext/CurlException.php b/src/web/curl/CurlException.php
similarity index 68%
rename from src/web/ext/CurlException.php
rename to src/web/curl/CurlException.php
index fbdcd1e..91ed199 100644
--- a/src/web/ext/CurlException.php
+++ b/src/web/curl/CurlException.php
@@ -1,5 +1,5 @@
 <?php
-namespace nur\sery\web\ext;
+namespace nur\sery\web\curl;
 
 use nur\sery\UserException;
 use Throwable;
@@ -7,16 +7,16 @@ use Throwable;
 class CurlException extends UserException {
   function __construct($ch, ?string $message=null, $code=0, ?Throwable $previous=null) {
     if ($message === null) $message = "(unknown error)";
-    $user_message = $message;
-    $tech_message = null;
+    $userMessage = $message;
+    $techMessage = null;
     if ($ch !== null) {
       $parts = [];
       $errno = curl_errno($ch);
       if ($errno != 0) $parts[] = "errno: $errno";
       $error = curl_error($ch);
       if ($error != "") $parts[] = "error: $error";
-      if ($parts) $tech_message = implode(", ", $parts);
+      if ($parts) $techMessage = implode(", ", $parts);
     }
-    parent::__construct($user_message, $tech_message, $code, $previous);
+    parent::__construct($userMessage, $techMessage, $code, $previous);
   }
 }
diff --git a/src/web/ext/curl.php b/src/web/curl/curl.php
similarity index 98%
rename from src/web/ext/curl.php
rename to src/web/curl/curl.php
index ad92f10..f6bbde5 100644
--- a/src/web/ext/curl.php
+++ b/src/web/curl/curl.php
@@ -1,5 +1,5 @@
 <?php
-namespace nur\sery\web\ext;
+namespace nur\sery\web\curl;
 
 /**
  * Class curl: wrapper pour curl