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abstract class GovnoPapa{

  private final Map<String, Object> properties = new HashMap<>();
      
  protected abstract void fillProperties(Map<String, Object> properties2);

  public Map<String, Object> getProperties() {
	if (this.properties.size() == 0) {
		fillProperties(this.properties);
	}
	return this.properties;
  }
       
   public void method do(){
             Map<String, Object> props = getProperties();
             do1(props);
             do2();
   }
   private void do1(Map<String, Object> props){ 
          ... do smth with props ..
  }

   private void do2(){
         Map<String, Object> props = getProperties();
            ... do smth with props ..
    }
}

class Child extends GovnoPapa{
     protected abstract void fillProperties(Map<String, Object> properties2){
         properties2.put("prop1", "smth1");
         properties2.put("prop2", "smth2");
   }
}

class App{
     public static void main(String[] args) {
         new Child().do();
     }
}