anchor.diff:  +Mutableonfiguration+ based on a +Configuration+ and a set of target backend +URIs+. If not sure you can call
   +getSupportedURIInfo()+ to see, which kind of URI's are  currently supported.
   On top of this API you also must have the correponding implementations installed that provide the backend logic needed
  -to write the changes back. This module by default supports writing back to files only. As an example how to write
  -configuration entries back refer to the following snippet:
  -
  -[source,java]
  -.Accessing a mutable configuration backed by etcd
  ---------------------------------------------
  -MutableConfiguration config = ConfigChangeManager.getConfiguration().query(
  +to write the changes back. This module by default supports writing back to properties and xml-properties files only.
  +As an example how to write configuration entries back refer to the following snippets:
  +
  +[source,java]
  +.Accessing and updating a mutable configuration backed by etcd
  +--------------------------------------------
  +MutableConfiguration config = Configuration.EMPTY.query(
       MutableConfigurationQuery.of("file:/home/etcd/backup-config.properties");
   
   config.set("newKey", "newValue")
  
positive.code:       .commit();
  --------------------------------------------
  
  Hereby it is also possible to provide multiple URLS that allows you to write your configuration chnges back to multiple
  backends in one go. Also be aware that the effective effect of your changes to the overall configuration changes cannot
  be easily predicted, since it depends on several aspects:
  
  . is the corresponding configuration resource configured as part of the current system's configuration?
  
negative.code: }
  --------------------------------------------
  
  Finally since the creation if a +MutableConfiguration+ based on an empty configuration instance is so common, it is
  possible to directlky create one:
  
  [source,java]
  .Checking for mutability
  --------------------------------------------
  MutableConfiguration config = MutableConfigurationQuery.createMutableConfiguration("file:/home/etcd/backup-config.properties");
  --------------------------------------------
  
  === Configuration Changes
  
  This module does not handle detection of changes to the overall system's +Configuration+. This can be done in
  