Easier way in Java to create a log file manually

Question

We are using slf4jlogger to log files. After the completion of the processes the log file is automatically saved in a restricted location. Since, I don't have access to download this file later, I want to create the log file manually following the slf4jlogger.

I have the following code:

test class

package com.worksap.company.hue.controller.com.ifx.inputengine.imports.sample;

import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class test {

    Logger logger = LoggerFactory.getLogger(this.getClass());

    @Test
    public void testFunction() {
        test2 t = new test2();
        StringBuilder execLog = new StringBuilder("");
        logger.info("Starting execution" + System.getProperty("line.separator"));
        execLog.append("Starting execution" + System.getProperty("line.separator"));
        t.executeProcess(execLog);

        logger.info("ending exection");
        execLog.append(String.format("ending execution" + System.getProperty("line.separator")));

        System.out.println(execLog);

    }
}

test2 class

package com.worksap.company.hue.controller.com.ifx.inputengine.imports.sample;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class test2 {

    Logger logger = LoggerFactory.getLogger(this.getClass());

    public void executeProcess(StringBuilder execLog) {
        logger.info("execution step");
        execLog.append(String.format("execution step" + System.getProperty("line.separator")));
    }

}

I then want to push the execLog content to AWS S3 so that I can have access to the log files later. I have the following questions:

1. Is this a good way to reproduce the logs or is there a better way to do it?
2. How can I avoid repetition of the same string content?

e.g.

logger.info("Starting execution" + System.getProperty("line.separator"));
        execLog.append("Starting execution" + System.getProperty("line.separator"));