JavaDoc Added.

src/Main.java

 import java.util.ArrayList;
 
 public class Main {
+    /**
+     * @param args System Args
+     *
+     */
     public static void main(String[] args) {
         VotingSystem system = new VotingSystem();
         ArrayList<String> singleVoting = new ArrayList<String>();

src/Person.java

@@ -2,19 +2,32 @@ public class Person {
     private String firstName;
     private String lastName;
 
+    /**
+     * @param firstName of voter
+     * @param lastName of voter
+     */
     public Person(String firstName, String lastName) {
         this.firstName = firstName;
         this.lastName = lastName;
     }
 
+    /**
+     * @return first name
+     */
     public String getFirstName() {
         return firstName;
     }
 
+    /**
+     * @return last name of voter
+     */
     public String getLastName() {
         return lastName;
     }
 
+    /**
+     * @return name of voter attached to his/her last name
+     */
     @Override
     public String toString() {
         return firstName + " " + lastName;

src/Vote.java

@@ -2,23 +2,40 @@ import ir.huri.jcal.JalaliCalendar;
 
 import java.util.Objects;
 
+/**
+ * class for vote
+ */
 public class Vote {
     private Person person;
     private JalaliCalendar date;
 
+    /**
+     * @param person who voted
+     * @param date jalali date of vote
+     */
     public Vote(Person person, JalaliCalendar date) {
         this.date = date;
         this.person = person;
     }
 
+    /**
+     * @return voter
+     */
     public Person getPerson() {
         return person;
     }
 
+    /**
+     * @return jalali date as a string
+     */
     public JalaliCalendar getDate() {
         return date;
     }
 
+    /**
+     * @param o the object being compared
+     * @return boolean value of equality
+     */
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
@@ -27,6 +44,9 @@ public class Vote {
         return getPerson().equals(vote.getPerson()) && getDate().equals(vote.getDate());
     }
 
+    /**
+     * @return hashcode person and date
+     */
     @Override
     public int hashCode() {
         return Objects.hash(getPerson(), getDate());

src/Voting.java

@@ -4,6 +4,9 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
 
+/**
+ * Voting Class
+ */
 public class Voting {
     private int type;
     private String question;
@@ -11,15 +14,27 @@ public class Voting {
     private HashSet<String> options;
     private HashMap<String, HashSet<Vote>> polls;
 
+    /**
+     * @return returns the question text
+     */
     public String getQuestion() {
         return question;
     }
 
+    /**
+     * @param type type of voting. 0 is single and 1 is multiple
+     * @param question question text of voting
+     */
     public Voting(int type, String question) {
         this(type, question, new HashSet<>());
 
     }
 
+    /**
+     * @param type type of voting. 0 is single and 1 is multiple
+     * @param question question text of voting
+     * @param options options for voting
+     */
     public Voting(int type, String question, HashSet<String> options) {
         this.type = type;
         this.question = question;
@@ -29,10 +44,17 @@ public class Voting {
     }
 
 
+    /**
+     * @param string have no idea what it is
+     */
     public void createPoll(String string) {
         // Not Clarified What It Does In The Documentation
     }
 
+    /**
+     * @param person voter
+     * @param selectedOptions selected options by voter in multiple type
+     */
     public void vote(Person person, ArrayList<String> selectedOptions) {
 
         this.voters.add(person);
@@ -51,6 +73,10 @@ public class Voting {
     }
 
 
+    /**
+     * @param person voter
+     * @param selectedOption selected option by voter in single type
+     */
     public void vote(Person person, String selectedOption) {
         this.voters.add(person);
         HashSet<Vote> voteSet = this.polls.containsKey(selectedOption) ?
@@ -60,10 +86,16 @@ public class Voting {
         this.polls.put(selectedOption, voteSet);
     }
 
+    /**
+     * @return voters list
+     */
     public ArrayList<Person> getVoters() {
         return voters;
     }
 
+    /**
+     * @param type type of voting. 0 is single and 1 is multiple
+     */
     public void printVotes(int type) {
         for (String option : this.options) {
             if (!this.polls.containsKey(option)) {
@@ -82,10 +114,16 @@ public class Voting {
         }
     }
 
+    /**
+     * @return all polls
+     */
     public HashMap<String, HashSet<Vote>> getPolls() {
         return polls;
     }
 
+    /**
+     * @return type of voting
+     */
     public int getType() {
         return type;
     }

src/VotingSystem.java

 import java.util.ArrayList;
 import java.util.HashSet;
 
+/**
+ * Voting System
+ */
 public class VotingSystem {
 
     private ArrayList<Voting> votingList;
 
+    /**
+     * Constructor
+     */
     public VotingSystem() {
         this.votingList = new ArrayList<>();
     }
 
+    /**
+     * @param type of voting. 0 is single and 1 is multiple
+     * @param question for voting
+     * @param optionsList for voting
+     * @return a vote
+     */
     public Voting createVoting(int type, String question, ArrayList<String> optionsList) {
         HashSet<String> optionsSet = new HashSet<>(optionsList);
         Voting voting = new Voting(type, question, optionsSet);
@@ -17,11 +29,18 @@ public class VotingSystem {
     }
 
 
+    /**
+     * @return a list of votings
+     */
     public ArrayList<Voting> getVotingList() {
         return votingList;
     }
 
 
+    /**
+     * @param type type of voting
+     * @return a list of voting by type
+     */
     public ArrayList<Voting> getVoting(int type) {
         ArrayList<Voting> sameVoting = new ArrayList<>();
 
@@ -34,6 +53,11 @@ public class VotingSystem {
     }
 
 
+    /**
+     * @param voting vote to a specific option
+     * @param person the voter
+     * @param selectedOptions options which are selected
+     */
     public void vote(Voting voting, Person person, ArrayList<String> selectedOptions) {
         voting.vote(person, selectedOptions);
     }