AuditReport.java

import java.io.BufferedWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class AuditReport {

    List<FileRecord> records = new ArrayList<>();

    void addRecord(FileRecord rec) {
        records.add(rec);
    }

    int fileCount() {
        Set<Path> set = new HashSet<>();
        for (FileRecord r : records) {
            set.add(r.file);
        }
        return set.size();
    }

    void printOverview() {
        System.out.println("\nTotal files inspected: " + fileCount());
    }

    void printDetails() {
        for (FileRecord r : records) {
            System.out.println(r);
        }
    }

    void saveToFile() throws IOException {
        BufferedWriter bw = Files.newBufferedWriter(Paths.get("audit_log.txt"));
        for (FileRecord r : records) {
            bw.write(r.toString());
            bw.newLine();
        }
        bw.close();
    }
}