diff --git a/StorageBundle/Adaptors/S3Storage.php b/StorageBundle/Adaptors/S3Storage.php
index 79ca6c6..1ea29a0 100644
--- a/StorageBundle/Adaptors/S3Storage.php
+++ b/StorageBundle/Adaptors/S3Storage.php
@@ -3,6 +3,7 @@
 namespace Bluesquare\StorageBundle\Adaptors;
 
 use Aws\S3\S3Client;
+use Bluesquare\StorageBundle\Exceptions\InvalidStorageConfiguration;
 use Symfony\Component\Config\Definition\Exception\Exception;
 
 /**
@@ -10,7 +11,7 @@ use Symfony\Component\Config\Definition\Exception\Exception;
  * Usage: $storage = new S3Storage('my_storage_name', $config);
  * @author Maxime Renou
  */
-class S3Storage
+class S3Storage implements StorageAdaptor
 {
     const MODE_PRIVATE = 'private';
     const MODE_PUBLIC = 'public-read';
@@ -22,7 +23,7 @@ class S3Storage
     public function __construct ($storage_name, $config)
     {
         if (!($this->configIsNormed($config)))
-            throw new Exception("Error from config file :(");
+            throw new InvalidStorageConfiguration("Invalid $storage_name storage configuration");
 
         $this->config = $config;
         $this->bucket = $config['bucket'];
@@ -38,6 +39,12 @@ class S3Storage
         ]);
     }
 
+    public function mode($name)
+    {
+        if ($name == 'public') return self::MODE_PUBLIC;
+        return self::MODE_PRIVATE;
+    }
+
     private function configIsNormed($config)
     {
         return (
diff --git a/StorageBundle/Adaptors/StorageAdaptor.php b/StorageBundle/Adaptors/StorageAdaptor.php
new file mode 100644
index 0000000..37fcb35
--- /dev/null
+++ b/StorageBundle/Adaptors/StorageAdaptor.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace Bluesquare\StorageBundle\Adaptors;
+
+interface StorageAdaptor
+{
+    public function index();
+    public function mode($name);
+    public function store($source_path, $target_path);
+    public function retrieve($distant_path, $local_path);
+    public function stream($distant_path, $target_stream);
+    public function delete($distant_path);
+}
\ No newline at end of file
diff --git a/StorageBundle/Annotations/Storage.php b/StorageBundle/Annotations/Storage.php
new file mode 100644
index 0000000..f376b16
--- /dev/null
+++ b/StorageBundle/Annotations/Storage.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace Bluesquare\StorageBundle\Annotations;
+
+use Doctrine\ORM\Mapping as ORM;
+
+/**
+ * @Annotation
+ */
+class Storage implements ORM\Annotation
+{
+    /**
+     * @var string
+     */
+    public $name;
+
+    /**
+     * @var string|null
+     */
+    public $prefix = null;
+
+    /**
+     * @var string|null
+     */
+    public $mode = null;
+
+    /**
+     * @var string|null
+     */
+    public $mime = null;
+}
diff --git a/StorageBundle/Exceptions/InvalidFileException.php b/StorageBundle/Exceptions/InvalidFileException.php
new file mode 100644
index 0000000..391f291
--- /dev/null
+++ b/StorageBundle/Exceptions/InvalidFileException.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Bluesquare\StorageBundle\Exceptions;
+
+class InvalidFileException extends \Exception
+{
+
+}
\ No newline at end of file
diff --git a/StorageBundle/Exceptions/InvalidStorageConfiguration.php b/StorageBundle/Exceptions/InvalidStorageConfiguration.php
new file mode 100644
index 0000000..4af0933
--- /dev/null
+++ b/StorageBundle/Exceptions/InvalidStorageConfiguration.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Bluesquare\StorageBundle\Exceptions;
+
+class InvalidStorageConfiguration extends \Exception
+{
+
+}
\ No newline at end of file
diff --git a/StorageBundle/Exceptions/MimeTypeException.php b/StorageBundle/Exceptions/MimeTypeException.php
new file mode 100644
index 0000000..e695160
--- /dev/null
+++ b/StorageBundle/Exceptions/MimeTypeException.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Bluesquare\StorageBundle\Exceptions;
+
+class MimeTypeException extends \Exception
+{
+
+}
\ No newline at end of file
diff --git a/StorageBundle/Exceptions/MissingStorageAnnotation.php b/StorageBundle/Exceptions/MissingStorageAnnotation.php
new file mode 100644
index 0000000..106f651
--- /dev/null
+++ b/StorageBundle/Exceptions/MissingStorageAnnotation.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Bluesquare\StorageBundle\Exceptions;
+
+class MissingStorageAnnotation extends \Exception
+{
+    
+}
\ No newline at end of file
diff --git a/StorageBundle/Exceptions/UnknownStorage.php b/StorageBundle/Exceptions/UnknownStorage.php
new file mode 100644
index 0000000..238d886
--- /dev/null
+++ b/StorageBundle/Exceptions/UnknownStorage.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Bluesquare\StorageBundle\Exceptions;
+
+class UnknownStorage extends \Exception
+{
+
+}
\ No newline at end of file
diff --git a/StorageBundle/Storage.php b/StorageBundle/Storage.php
index c69072c..060dc30 100644
--- a/StorageBundle/Storage.php
+++ b/StorageBundle/Storage.php
@@ -4,6 +4,14 @@ namespace Bluesquare\StorageBundle;
 
 use Aws\S3\S3Client;
 use Bluesquare\StorageBundle\Adaptors\S3Storage;
+use Bluesquare\StorageBundle\Exceptions\InvalidFileException;
+use Bluesquare\StorageBundle\Exceptions\MimeTypeException;
+use Bluesquare\StorageBundle\Exceptions\MissingStorageAnnotation;
+use Bluesquare\StorageBundle\Exceptions\UnknownStorage;
+use Symfony\Component\HttpFoundation\File\UploadedFile;
+use Bluesquare\StorageBundle\Annotations\Storage as StorageAnnotation;
+use Symfony\Component\DependencyInjection\Container;
+use Doctrine\Common\Annotations\AnnotationReader;
 
 /**
  * Interface de manipulation des stockages préconfigurés
@@ -32,4 +40,65 @@ class Storage
 
         return (null);
     }
+
+    public function store($entity, $attribute, $file)
+    {
+        $reflection = new \ReflectionProperty($entity, $attribute);
+        $reader = new AnnotationReader();
+        $annotations = $reader->getPropertyAnnotations($reflection);
+
+        $storage_annotation = null;
+
+        foreach ($annotations as $annotation)
+        {
+            if ($annotation instanceof StorageAnnotation) {
+                $storage_annotation = $annotation;
+            }
+        }
+
+        if (is_null($storage_annotation))
+        {
+            throw new MissingStorageAnnotation("Missing Storage annotation for $attribute in ".get_class($entity));
+        }
+
+        $file_hash = hash('sha256', time().$attribute.uniqid());
+        $storage = $this->get($storage_annotation->name);
+
+        if (is_null($storage_annotation))
+        {
+            throw new UnknownStorage("Unknown storage for $attribute in ".get_class($entity));
+        }
+
+        $prefix = is_null($storage_annotation->prefix) || empty($storage_annotation->prefix) ? '' : trim($storage_annotation->prefix, '/').'/';
+
+        $mode = $storage->mode($storage_annotation->mode);
+
+        if ($file instanceof UploadedFile) {
+            if (!is_null($storage_annotation->mime)) {
+                $valid = true;
+                if (count(explode('/', $storage_annotation->mime)) > 1) {
+                    $valid = strtolower($storage_annotation->mime) == $file->getMimeType();
+                }
+                else {
+                    $valid = strtolower($storage_annotation->mime) == explode('/', $file->getMimeType())[0];
+                }
+                if (!$valid) {
+                    throw new MimeTypeException("Invalid mime type");
+                }
+            }
+            $storage->store($file->getRealPath(), "$prefix$file_hash", $mode);
+        }
+        elseif (is_string($file) && file_exists($file)) {
+            $storage->store($file, "$prefix$file_hash", $mode);
+        }
+        else {
+            throw new InvalidFileException("Invalid file arguement");
+        }
+
+        $camel = lcfirst(Container::camelize($attribute));
+
+        $entity->{"set$camel"}($file_hash);
+
+        return $file_hash;
+    }
 }
diff --git a/composer.json b/composer.json
index 333eefc..3d4ddac 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,8 @@
     "type": "symfony-bundle",
     "require": {
 		"php": ">=7.1",
-        "aws/aws-sdk-php": "^3.81"
+        "aws/aws-sdk-php": "^3.81",
+        "doctrine/event-manager": "*"
     },
     "autoload": {
         "psr-4": {