Structurizr for Java includes an implementation of the "software guidebook" from Simon Brown's Software Architecture for Developers book, which can be used to document your software architecture.
Example
To use this template, create an instance of the StructurizrDocumentationTemplate class. You can then add documentation sections as needed, each associated with a software system in your software architecture model, using Markdown or AsciiDoc. For example:
StructurizrDocumentationTemplate template = new StructurizrDocumentationTemplate(workspace); File documentationRoot = new File("./structurizr-examples/src/com/structurizr/example/documentation/structurizr/markdown"); template.addContextSection(softwareSystem, new File(documentationRoot, "01-context.md")); template.addFunctionalOverviewSection(softwareSystem, new File(documentationRoot, "02-functional-overview.md")); template.addQualityAttributesSection(softwareSystem, new File(documentationRoot, "03-quality-attributes.md")); template.addConstraintsSection(softwareSystem, new File(documentationRoot, "04-constraints.md")); template.addPrinciplesSection(softwareSystem, new File(documentationRoot, "05-principles.md")); template.addSoftwareArchitectureSection(softwareSystem, new File(documentationRoot, "06-software-architecture.md")); template.addDataSection(softwareSystem, new File(documentationRoot, "07-data.md")); template.addInfrastructureArchitectureSection(softwareSystem, new File(documentationRoot, "08-infrastructure-architecture.md")); template.addDeploymentSection(softwareSystem, new File(documentationRoot, "09-deployment.md")); template.addDevelopmentEnvironmentSection(softwareSystem, new File(documentationRoot, "10-development-environment.md")); template.addOperationAndSupportSection(softwareSystem, new File(documentationRoot, "11-operation-and-support.md")); template.addDecisionLogSection(softwareSystem, new File(documentationRoot, "12-decision-log.md"));
Structurizr will create navigation controls based upon the the sections in the documentation, and the software systems they have been associated with. See StructurizrDocumentationExample.java for the full code, and https://structurizr.com/share/14181/documentation to see the rendered documentation.
More information
See Help - Documentation for more information about how headings are rendered, and how to embed diagrams from you workspace into the documentation.