Clean up and add comments for classes.
diff --git a/src/com/android/camera/NoSearchActivity.java b/src/com/android/camera/NoSearchActivity.java
index f859ce9..1e1e2d2 100644
--- a/src/com/android/camera/NoSearchActivity.java
+++ b/src/com/android/camera/NoSearchActivity.java
@@ -18,6 +18,10 @@
 
 import android.app.Activity;
 
+/**
+ * This class disables the search key function. To use it, just inherit from
+ * {@code NoSearchActivity} instead of {@code Activity}.
+ */
 public class NoSearchActivity extends Activity {
     @Override
     public boolean onSearchRequested() {