diff --git a/analyzer.go b/analyzer.go
index a0a83a80..f2f17996 100644
--- a/analyzer.go
+++ b/analyzer.go
@@ -12,6 +12,7 @@ import (
 	"github.com/golang/dep/internal/gps"
 )
 
+// Analyzer implements gps.ProjectAnalyzer.
 type Analyzer struct{}
 
 // HasDepMetadata determines if a dep manifest exists at the specified path.
@@ -21,6 +22,8 @@ func (a Analyzer) HasDepMetadata(path string) bool {
 	return err == nil && fileOK
 }
 
+// DeriveManifestAndLock reads and returns the manifest at path/ManifestName or nil if one is not found.
+// The Lock is always nil for now.
 func (a Analyzer) DeriveManifestAndLock(path string, n gps.ProjectRoot) (gps.Manifest, gps.Lock, error) {
 	if !a.HasDepMetadata(path) {
 		return nil, nil, nil
@@ -42,6 +45,7 @@ func (a Analyzer) DeriveManifestAndLock(path string, n gps.ProjectRoot) (gps.Man
 	return m, nil, nil
 }
 
+// Info returns the name and version of this ProjectAnalyzer.
 func (a Analyzer) Info() (string, int) {
 	return "dep", 1
 }
diff --git a/project.go b/project.go
index 93a0ad3b..309316fb 100644
--- a/project.go
+++ b/project.go
@@ -39,13 +39,14 @@ func findProjectRoot(from string) (string, error) {
 	}
 }
 
+// A Project holds a Manifest and optional Lock for a project.
 type Project struct {
 	// AbsRoot is the absolute path to the root directory of the project.
 	AbsRoot string
 	// ImportRoot is the import path of the project's root directory.
 	ImportRoot gps.ProjectRoot
 	Manifest   *Manifest
-	Lock       *Lock
+	Lock       *Lock // Optional
 }
 
 // MakeParams is a simple helper to create a gps.SolveParameters without setting