java, try-resourses block demo -> unreportedException java.io.IOException

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class Main {
    public static void main(String...args) {
        TryResoursesDemo.copyFile("fileFrom", "fileTo");
    }
}

class TryResoursesDemo {
    public static void copyFile(String fileFrom, String fileTo) throws IOException {
        try (FileInputStream fin = new FileInputStream(fileFrom);
             FileOutputStream fout  = new FileOutputStream(fileTo);
        ) {
            int ch;
            while ((ch = fin.read()) != -1) {
                fout.write(ch);
            }
            System.out.println("file has been copyied.");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Error:(7, 34) java: unreported exception java.io.IOException; must be caught or declared to be thrown