java: add some @Override annotations

Change-Id: I291db1dff5ab3ce40fda6f822a0e3ff1e6ef36c1
Reviewed-on: https://gerrit.libreoffice.org/19855
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>

scripting/java/com/sun/star/script/framework/provider/javascript/ScriptEditorForJavaScript.java

@@ -240,6 +240,7 @@ public class ScriptEditorForJavaScript implements ScriptEditor {
                 });
                 Context.addContextListener(sdb);
                 sdb.setScopeProvider(new ScopeProvider() {
+                    @Override
                     public Scriptable getScope() {
                         return org.mozilla.javascript.tools.shell.Main.getScope();
                     }