doing

src/Employee.java

+import java.util.ArrayList;
+
+public class Employee extends Personnel {
+    private ArrayList<Report> reports = new ArrayList<>();
+    private int level;
+    public Employee (String name , double basicSalary , int level){
+        super(name , basicSalary);
+        this.level = level;
+    }
+
+    public ArrayList<Report> getReports() {
+        return reports;
+    }
+
+    public int getLevel() {
+        return level;
+    }
+    public void increaseLevel(){
+        if (this.level == 3)
+            return;
+        else {
+            this.level++;
+        }
+    }
+    public void decreaseLevel(){
+        if (this.level == 1)
+            return;
+        else {
+            this.level--;
+        }
+    }
+}

src/Personnel.java

+import java.util.ArrayList;
+
+public class Personnel {
+    protected ArrayList<Time> inTime = new ArrayList<>() ;
+    protected ArrayList<Time> outTime = new ArrayList<>() ;
+    protected String name;
+    protected double basicSalary;
+    protected double currentSalary;
+    public Personnel(String name , double basicSalary){
+        this.name = name;
+        this.basicSalary = basicSalary;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public double getBasicSalary() {
+        return basicSalary;
+    }
+
+    public double getCurrentSalary() {
+        return currentSalary;
+    }
+
+    public void setInTime(Time inTime) {
+        this.inTime.add( inTime);
+    }
+    public void setOutTime(Time outTime) {
+        this.inTime.add( outTime);
+    }
+}

src/Report.java

+public class Report {
+    private String report;
+    private Time time;
+    public Report (String report , Time time){
+        this.report = report;
+        this.time = time;
+    }
+
+    public String getReport() {
+        return report;
+    }
+
+    public Time getTime() {
+        return time;
+    }
+}

src/Time.java

+public class Time {
+    int hour;
+    int minute;
+    int second;
+    String date;
+    public Time(int hour , int minute , int second , String date){
+        this.hour = hour;
+        this.minute = minute;
+        this.second = second;
+        this.date = date;
+    }
+    @Override
+    public String toString(){
+        return Integer.toString(hour) + " : " + Integer.toString(minute) + " : " + Integer.toString(second);
+    }
+}