title: java exception handling in constructor
body: <p>honestly I'm not very experienced with exception handling, because often for my laziness I tend to not handle exceptions. So here's a very basic question.</p>
  
  <p>I would like to know what's the cleanest way to accomplish this situation, with an exception handling approach:</p>
  
  <p>I have a class (ConfigManager) that  reads a file within its constructor, and need that file to exists to be constructed correctly, given as the constructor parameter.
  If the file doesn't exist, I would like to catch the FileNotFoundException, create the file with some defaults values, and continue the creation of the ConfigManager object with the default config file now available.</p>
  
  <p>Here's some code:</p>
  
  <pre><code>class ConfigManager{
      ConfigManager(String file){
           try{
               builder = builderFactory.newDocumentBuilder();
               document = builder.parse (new FileInputStream(file));
               ....
           }catch (FileNotFoundException e) {
  
          File configFile =  new File (file);
  
          try {
  
              configFile.createNewFile();
              BufferedWriter writer = new BufferedWriter(new FileWriter(configFile));
              writer.write(this.defaultConfig);
              writer.close();
  
  
              return new ConfigManager(string); //Here's the problem. I can't do that but I need to try build ConfigManager again. How do that?
  
          } catch (IOException e1) {
              // TODO Auto-generated catch block
              e1.printStackTrace();
          }
      }
  }  
  </code></pre>
  
  <p>How to construct a new ConfigManager object, after the default config file has been created?
  Is that the rigth way to handle such type of exception?</p>
  
  <p>thanks in advance</p>