Renamed extension ID to match class ID

Change-Id: I895e598b2383e9c9187fde8315ca350059a697c1
diff --git a/bundles/org.eclipse.capra.handler.file/plugin.xml b/bundles/org.eclipse.capra.handler.file/plugin.xml
index 6b7c7f8..0606124 100644
--- a/bundles/org.eclipse.capra.handler.file/plugin.xml
+++ b/bundles/org.eclipse.capra.handler.file/plugin.xml
@@ -16,7 +16,7 @@
 
 <plugin>
    <extension
-         id="org.eclipse.capra.handler.file.IFileHandler"
+         id="org.eclipse.capra.handler.file.FileHandler"
          point="org.eclipse.capra.configuration.artifactHandlers">
       <artifactHandler
             class="org.eclipse.capra.handler.file.FileHandler">