diff --git a/core/plugins/org.eclipse.dltk.core.index.sql.h2/src/org/eclipse/dltk/core/index/sql/h2/H2Index.java b/core/plugins/org.eclipse.dltk.core.index.sql.h2/src/org/eclipse/dltk/core/index/sql/h2/H2Index.java
index 6431647..dfa6717 100644
--- a/core/plugins/org.eclipse.dltk.core.index.sql.h2/src/org/eclipse/dltk/core/index/sql/h2/H2Index.java
+++ b/core/plugins/org.eclipse.dltk.core.index.sql.h2/src/org/eclipse/dltk/core/index/sql/h2/H2Index.java
@@ -29,11 +29,13 @@
 
 	private static H2Index plugin;
 
+	@Override
 	public void start(BundleContext context) throws Exception {
 		super.start(context);
 		plugin = this;
 	}
 
+	@Override
 	public void stop(BundleContext context) throws Exception {
 		plugin = null;
 		super.stop(context);
diff --git a/core/plugins/org.eclipse.dltk.core.index.sql.h2/src/org/eclipse/dltk/core/index/sql/h2/H2IndexPreferences.java b/core/plugins/org.eclipse.dltk.core.index.sql.h2/src/org/eclipse/dltk/core/index/sql/h2/H2IndexPreferences.java
index 65f823d..63ed305 100644
--- a/core/plugins/org.eclipse.dltk.core.index.sql.h2/src/org/eclipse/dltk/core/index/sql/h2/H2IndexPreferences.java
+++ b/core/plugins/org.eclipse.dltk.core.index.sql.h2/src/org/eclipse/dltk/core/index/sql/h2/H2IndexPreferences.java
@@ -30,6 +30,7 @@
 	 */
 	public static final String SCHEMA_VERSION = "schemaVersion"; //$NON-NLS-1$
 
+	@Override
 	public void initializeDefaultPreferences() {
 		IEclipsePreferences p = ((IScopeContext) new DefaultScope())
 				.getNode(H2Index.PLUGIN_ID);