Added comment

src/main/java/no/bioforsk/vips/entity/WeatherObservation.java

@@ -74,7 +74,8 @@ public class WeatherObservation implements Comparable{
     }
         
     public final void setTimeMeasured(Date timeMeasured) { this.timeMeasured = timeMeasured; }
-    @JsonFormat(shape=JsonFormat.Shape.STRING, pattern="yyyy-MM-dd'T'HH:mm:ssXXX", timezone="UTC")
+    
+    @JsonFormat(shape=JsonFormat.Shape.STRING, pattern="yyyy-MM-dd'T'HH:mm:ssXXX", timezone="UTC") // Java >= 7
     public Date getTimeMeasured() { return this.timeMeasured; }
     
     public final void setElementMeasurementTypeId(String elementMeasurementTypeId) {