code: protected void parsePropertiesFile(InputStream propertiesInputStream)
              throws MojoExecutionException {
          if (propertiesInputStream == null) {
              throw new MojoExecutionException("Properties file InputStream is null.");
          }
          Properties props = new Properties();
          try {
              props.load(propertiesInputStream);
          } catch (IOException e) {
              throw new MojoExecutionException("Could not load the properties Liquibase file", e);
          }
  
          for (Iterator it = props.keySet().iterator(); it.hasNext(); ) {
              String key = null;
              try {
                  key = (String) it.next();
                  Field field = MavenUtils.getDeclaredField(this.getClass(), key);
  
                  if (propertyFileWillOverride) {
                      getLog().debug("  properties file setting value: " + field.getName());
                      setFieldValue(field, props.get(key).toString());
                  } else {
                      if (!isCurrentFieldValueSpecified(field)) {
                          getLog().debug("  properties file setting value: " + field.getName());
                          setFieldValue(field, props.get(key).toString());
                      }
                  }
              } catch (Exception e) {
                  getLog().info("  '" + key + "' in properties file is not being used by this "
                          + "task.");
              }
          }
      }
docs: Parses a properties file and sets the associated fields in the plugin.
  
  @param propertiesInputStream The input stream which is the Liquibase properties that
  needs to be parsed.
  @throws org.apache.maven.plugin.MojoExecutionException If there is a problem parsing
  the file.