1 files changed, 12 insertions, 7 deletions
diff --git a/lib/private/preview/provider.php b/lib/private/preview/provider.php
index ead67eaeef7..1d6fac13965 100644
--- a/lib/private/preview/provider.php
+++ b/lib/private/preview/provider.php
@@ -1,10 +1,17 @@
 <?php
 namespace OC\Preview;
 
-abstract class Provider {
+use OCP\Preview\IProvider;
+
+abstract class Provider implements IProvider {
 	private $options;
 
-	public function __construct($options) {
+	/**
+	 * Constructor
+	 *
+	 * @param array $options
+	 */
+	public function __construct(array $options = []) {
 		$this->options = $options;
 	}
 
@@ -16,10 +23,10 @@ abstract class Provider {
 	/**
 	 * Check if a preview can be generated for $path
 	 *
-	 * @param \OC\Files\FileInfo $file
+	 * @param \OCP\Files\FileInfo $file
 	 * @return bool
 	 */
-	public function isAvailable($file) {
+	public function isAvailable(\OCP\Files\FileInfo $file) {
 		return true;
 	}
 
@@ -30,9 +37,7 @@ abstract class Provider {
 	 * @param int $maxY The maximum Y size of the thumbnail. It can be smaller depending on the shape of the image
 	 * @param bool $scalingup Disable/Enable upscaling of previews
 	 * @param \OC\Files\View $fileview fileview object of user folder
-	 * @return mixed
-	 * 		false if no preview was generated
-	 *		OC_Image object of the preview
+	 * @return bool|\OCP\IImage false if no preview was generated
 	 */
 	abstract public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview);
 }