Minor style clean-up

MyTracksLib/src/com/google/android/apps/mytracks/content/MyTracksLocation.java

@@ -36,8 +36,8 @@ public class MyTracksLocation extends Location {
     this.sensorDataSet = sd;
   }
 
-  public MyTracksLocation(String string) {
-    super(string);
+  public MyTracksLocation(String provider) {
+    super(provider);
   }
 
   public Sensor.SensorDataSet getSensorDataSet() {

MyTracksLib/src/com/google/android/apps/mytracks/content/MyTracksProviderUtils.java

@@ -315,6 +315,7 @@ public interface MyTracksProviderUtils {
 
     /**
      * Should be called in case the underlying iterator hasn't reached the last record.
+     * Calling it if it has reached the last record is a no-op.
      */
     void close();
   }