Added getters and setters in Administration class

src/main/java/org/example/Administration.java

@@ -14,6 +14,38 @@ public class Administration {
     private List<Course> courses;
     Scanner scanner = new Scanner(System.in);
 
+    public List<Professor> getProfessors() {
+        return professors;
+    }
+
+    public void setProfessors(List<Professor> professors) {
+        this.professors = professors;
+    }
+
+    public List<Admin> getAdmins() {
+        return admins;
+    }
+
+    public void setAdmins(List<Admin> admins) {
+        this.admins = admins;
+    }
+
+    public List<Student> getStudents() {
+        return students;
+    }
+
+    public void setStudents(List<Student> students) {
+        this.students = students;
+    }
+
+    public List<Course> getCourses() {
+        return courses;
+    }
+
+    public void setCourses(List<Course> courses) {
+        this.courses = courses;
+    }
+
     /**
      *  Constructor
      */