Docs: Add parameter

CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/utils/BoundingBoxCalculator.java

@@ -52,8 +52,8 @@ public class BoundingBoxCalculator {
 	 * empty array is returned. This is considered an axis aligned bounding box.
 	 * Only the exterior rings of the polygons is used as inner rings should be
 	 * within the exterior or they are faulty.
-	 * 
-	 * @param a list of polygons containing the vertices
+	 *
+	 * @param polygons a list of polygons containing the vertices
 	 * @return an BoundingBox containing the two end points of the bounding box.
 	 */
 	public static BoundingBox calculateBoundingBox(Collection<? extends Polygon> polygons) {