Added Course into javadoc

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

buisnesslogic/src/main/java/com/plannaplan/entities/Groups.java

@@ -34,6 +34,16 @@ public class Groups {
     public Groups() {
     }
 
+    /**
+     * Groups
+     * 
+     * @param capacity capacity given to the groups
+     * @param room room given to the groups
+     * @param course course given to the groups
+     * @param time time given to the groups
+     * @param day day given to the groups
+     * @param lecturer lecturer given to the groups
+     */
     public Groups(int capacity, String room, Course course, int time, WeekDay day, Lecturer lecturer) {
         this.capacity = capacity;
         this.room = room;
@@ -44,66 +54,130 @@ public class Groups {
         this.type = capacity >= 50 ? GroupType.LECTURE : GroupType.CLASS;
     }
 
+    /**
+     * getId
+     * @return id
+     */
     public Long getId() {
         return this.id;
     }
 
+    /**
+     * getLecturer
+     * @return lecturer
+     */
     public Lecturer getLecturer() {
         return lecturer;
     }
 
+    /**
+     * setLecturer
+     * @param lecturer set lecturer into groups
+     */
     public void setLecturer(Lecturer lecturer) {
         this.lecturer = lecturer;
     }
 
+    /**
+     * WeekDay
+     * @return day
+     */
     public WeekDay getDay() {
         return day;
     }
 
+    /**
+     * setLecturer
+     * @param day set day into groups
+     */
     public void setDay(WeekDay day) {
         this.day = day;
     }
 
+    /**
+     * GroupType
+     * @return type
+     */
     public GroupType getType() {
         return type;
     }
 
+    /**
+     * setType
+     * @param type set type into groups
+     */
     public void setType(GroupType type) {
         this.type = type;
     }
 
+    /**
+     * getCapacity
+     * @return capacity
+     */
     public int getCapacity() {
         return capacity;
     }
 
+    /**
+     * setCapacity
+     * @param capacity set capacity into groups
+     */
     public void setCapacity(int capacity) {
         this.capacity = capacity;
     }
 
+    /**
+     * getRoom
+     * @return room
+     */
     public String getRoom() {
         return room;
     }
 
+    /**
+     * setRoom
+     * @param room set room into groups
+     */
     public void setRoom(String room) {
         this.room = room;
     }
 
+    /**
+     * getTime
+     * @return time
+     */
     public int getTime() {
         return time;
     }
 
+    /**
+     * setTime
+     * @param time set time into groups
+     */
     public void setTime(int time) {
         this.time = time;
     }
 
+    /**
+     * getCourseId
+     * @return course
+     */
     public Course getCourseId() {
         return course;
     }
 
+    /**
+     * setCourseId
+     * @param courseId set courseId into groups
+     */
     public void setCourseId(Course courseId) {
         this.course = courseId;
     }
 
+    /**
+     * getTimeString
+     * @return time as formated String
+     */
     public String getTimeString() {
         int minutes = this.getTime() % 60;
         String hoursString = Integer.toString(this.getTime() / 60);