code: private static Properties initializeConfigurationProperties() {
  		Properties properties = new Properties();
  
  		InputStream in = GeoPackageProperties.class.getResourceAsStream("/"
  				+ PropertyConstants.PROPERTIES_FILE);
  		if (in != null) {
  			try {
  				properties.load(in);
  			} catch (Exception e) {
  				log.log(Level.SEVERE, "Failed to load properties file: "
  						+ PropertyConstants.PROPERTIES_FILE, e);
  			} finally {
  				try {
  					in.close();
  				} catch (IOException e) {
  					log.log(Level.WARNING, "Failed to close properties file: "
  							+ PropertyConstants.PROPERTIES_FILE, e);
  				}
  			}
  		} else {
  			log.log(Level.SEVERE, "Failed to load properties, file not found: "
  					+ PropertyConstants.PROPERTIES_FILE);
  		}
  
  		return properties;
  	}
docs: Initialize the configuration properties
  
  @return properties