Added CourseService into javadoc

Signed-off-by: Marcin Woźniak <y0rune@aol.com>

buisnesslogic/src/main/java/com/plannaplan/services/CourseService.java

@@ -18,23 +18,43 @@ public class CourseService {
     @Autowired
     private CourseRepository repo;
 
+    /*
+     * getCourseByName
+     * Return Course By Name
+     */
     public Optional<Course> getCourseByName(String name) {
         return this.repo.findByName(name);
     }
 
+    /*
+     * getAllCourses
+     * Return List of get courses
+     */
     public List<Course> getAllCourses() {
         return this.repo.findAll();
     }
 
+    /*
+     * save
+     * @param course which course you would like to save
+     */
     public Course save(Course course) {
         this.repo.save(course);
         return course;
     }
 
+    /*
+     * delete
+     * @param course which course you would like to delete
+     */
     public void delete(Course course) {
         this.repo.delete(course);
     }
 
+    /*
+     * getCoursesAmmount
+     * Return a ammount of courses
+     */
     public int getCoursesAmmount() {
         return (int) this.repo.count();
     }