ADD::added comments to most classes to make it more understandable

src/Common/src/main/java/greenify/common/ActivityDto.java

@@ -11,10 +11,10 @@ public class ActivityDto {
 
     /**
      * Constructor for ActivityDto.
-     * @param id of the activity
-     * @param name of the activity
-     * @param description of the activity
-     * @param score of the activity
+     * @param id id of the activity
+     * @param name name of the activity
+     * @param description description of the activity
+     * @param score score of the activity
      */
     public ActivityDto(Long id, String name, String description, int score) {
         this.id = id;
@@ -23,34 +23,68 @@ public class ActivityDto {
         this.score =  score;
     }
 
+    //all the getters and setters of the class
+
+    /**
+     * gets the name of the activity.
+     * @return the name of the activity
+     */
     public String getName() {
         return name;
     }
 
+    /**
+     * sets the name of the activity.
+     * @param name the name to be set of the activity.
+     */
     public void setName(String name) {
         this.name = name;
     }
 
+    /**
+     * gets the id of the activity.
+     * @return the id of the activity.
+     */
     public Long getId() {
         return id;
     }
 
+    /**
+     * sets the id of the activity.
+     * @param id the id to be set of the activity.
+     */
     public void setId(Long id) {
         this.id = id;
     }
 
+    /**
+     * gets the description of the activity.
+     * @return the description of the activity.
+     */
     public String getDescription() {
         return description;
     }
 
+    /**
+     * sets the description of the activity.
+     * @param description the description to be set of the activity.
+     */
     public void setDescription(String description) {
         this.description = description;
     }
 
+    /**
+     * gets the score of the activity.
+     * @return the score of the activity.
+     */
     public int getScore() {
         return score;
     }
 
+    /**
+     * sets the score of the activity.
+     * @param score the score to be set of the activity.
+     */
     public void setScore(int score) {
         this.score = score;
     }