/**
* Creates a singleton DataLogger or returns the already created object. Before writing to a file
* first openWriter() must be called.
*
* @return The singleton object.
*/
public static DataLogger getInstance() {
if (singletonInstance == null) {
singletonInstance = new DataLogger();
singletonInstance.mFileName = "ProbeLog_" + new Date().getTime();
singletonInstance.openWriter();
}
return singletonInstance;
}