code: private String getStringInternal(final String key, final String defaultValue) {
  
  		synchronized (this.confData) {
  
  			if (!this.confData.containsKey(key)) {
  				return defaultValue;
  			}
  
  			return this.confData.get(key);
  		}
  	}
docs: Returns the value associated with the given key as a string.
  
  @param key
  key the key pointing to the associated value
  @param defaultValue
  defaultValue the default value which is returned in case there is no value associated with the given key
  @return the (default) value associated with the given key