Implemented all methods marked with WIP

Lab2/src/main/java/org/lumijiez/base/Faculty.java

@@ -3,6 +3,7 @@ package org.lumijiez.base;
 import org.lumijiez.enums.StudyField;
 
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.List;
 
 public class Faculty implements Serializable {
@@ -15,7 +16,7 @@ public class Faculty implements Serializable {
 
     private String name;
     private String abbreviation;
-    private List<Group> groups;
+    private List<Group> groups = new ArrayList<>();
     private StudyField field;
 
     public void addGroup(Group group) {
@@ -54,4 +55,9 @@ public class Faculty implements Serializable {
         this.field = field;
     }
 
+    @Override
+    public String toString() {
+        return getName();
+    }
+
 }

Lab2/src/main/java/org/lumijiez/base/Group.java

@@ -54,4 +54,9 @@ public class Group implements Serializable {
             }
         return null;
     }
+
+    @Override
+    public String toString() {
+        return name;
+    }
 }

Lab2/src/main/java/org/lumijiez/base/Student.java

@@ -9,11 +9,14 @@ import java.util.List;
 
 public class Student implements Serializable {
 
-    public Student(String name, String surname, Group group, Faculty faculty) {
+    public Student(String name, String surname, Group group, Faculty faculty, Date birth, Date enrol) {
         this.name = name;
         this.surname = surname;
         this.fullname = name + " " + surname;
         this.group = group;
+        this.faculty = faculty;
+        this.dateOfBirth = birth;
+        this.enrollmentDate = enrol;
         this.FSD = new FullStudentData(name, surname, group.getName(), faculty.getName());
     }
 
@@ -116,4 +119,9 @@ public class Student implements Serializable {
         this.dateOfBirth = dateOfBirth;
     }
 
+    @Override
+    public String toString() {
+        return fullname;
+    }
+
 }