How to write code making sure it follows best practices

Step 1) Resolve all sonar issues

Step 2) Make sure custum constants are defined in single file

Step 3) Use commonly used constans from existing API's.

            Refer below link to get more details of existing constants

            https://helpx.adobe.com/experience-manager/6-5/sites/developing/using/reference-materials/javadoc/constant-values.html

Note:

1) While writing Models refer: https://docs.adobe.com/content/help/en/experience-manager-65/developing/platform/sling-adapters.html

2) If path field root path should be locale specific, use ACS commons contextual-path-browser field.

https://adobe-consulting-services.github.io/acs-aem-commons/features/ui-widgets/contextual-pathfield-browser/index.html#contextual-path-browser