Provides Android's Log.d() like logging for logging to files

FileLogger.java

package com.rish.imagestab.utils;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;

/**
 * Created by rish on 14/6/17.
 * Helps log text to a file.
 * Maintains list of created files, and keeps their InputStreams open until 
 * logAllFiles() is called.
 * 
 * Syntactically this is similar to Android's Log.d(TAG, "text-to-log") method 
 * where you mention the TAG to log to, and the contents you'd like to log.
 *
 * In this, you call the FileLogger.log(file, "text-to-log").
 *
 * I usually maintain the file argument in another static class called BasePath.
 *
 * NOTE : This is not optimized, maybe not the right way to do this either.
 * Do point out any mistakes!
 */

public class FileLogger {

    private static FileLogger fileLogger;

    private HashMap<String, FileLog> fileHashmap;

    private FileLogger() {
        fileHashmap = new HashMap<>();
    }

    public static FileLogger get() {
        if (fileLogger == null) {
            fileLogger = new FileLogger();
        }
        return fileLogger;
    }

    public void log(File file, String s) {
        try {
            if (fileHashmap.containsKey(file.getAbsolutePath())) {
                fileHashmap.get(file.getAbsolutePath()).bufferedWriter.append(s + "\n");
            } else {
                if (!file.exists()) {
                    file.createNewFile();
                }
                BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(file, true));
                FileLog fileLog = new FileLog(file, bufferedWriter);
                fileHashmap.put(file.getAbsolutePath(), fileLog);
                log(file, s);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void logAllFiles() {
        for (String key : fileHashmap.keySet()) {
            write(fileHashmap.get(key));
        }
    }

    private void write(FileLog fileLog) {
        try {
            fileLog.bufferedWriter.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private class FileLog {
        private File file;
        private BufferedWriter bufferedWriter;

        public FileLog(File file, BufferedWriter bufferedWriter) {
            this.file = file;
            this.bufferedWriter = bufferedWriter;
        }
    }
}