[checkstyle] (modifier) InterfaceMemberImpliedModifier
diff --git a/src/main/java/org/apache/sling/commons/clam/ClamService.java b/src/main/java/org/apache/sling/commons/clam/ClamService.java
index 11eeb3b..d223d2a 100644
--- a/src/main/java/org/apache/sling/commons/clam/ClamService.java
+++ b/src/main/java/org/apache/sling/commons/clam/ClamService.java
@@ -37,6 +37,6 @@
      * @return The scan result from Clam
      * @throws IOException if scanning data or parsing reply fails
      */
-    @NotNull ScanResult scan(@NotNull final InputStream data) throws IOException;
+    public abstract @NotNull ScanResult scan(@NotNull final InputStream data) throws IOException;
 
 }