diff --git a/database/all/internal.go b/database/all/internal.go
index 9e261e1..ddaefc8 100644
--- a/database/all/internal.go
+++ b/database/all/internal.go
@@ -42,9 +42,9 @@ func (conn *Connection) AddStatistics(stats *runtime.GlobalStats, time time.Time
 	}
 }
 
-func (conn *Connection) DeleteNode(deleteAfter time.Duration) {
+func (conn *Connection) PruneNodes(deleteAfter time.Duration) {
 	for _, item := range conn.list {
-		item.DeleteNode(deleteAfter)
+		item.PruneNodes(deleteAfter)
 	}
 }
 
diff --git a/database/database.go b/database/database.go
index a23a004..dbdae7d 100644
--- a/database/database.go
+++ b/database/database.go
@@ -8,24 +8,25 @@ import (
 
 // Connection interface to use for implementation in e.g. influxdb
 type Connection interface {
-	// AddNode data for a single node
+	// AddNode stores data of a single node
 	AddNode(nodeID string, node *runtime.Node)
+
+	// AddStatistics stores global statistics
 	AddStatistics(stats *runtime.GlobalStats, time time.Time)
 
-	DeleteNode(deleteAfter time.Duration)
+	// PruneNodes prunes historical per-node data
+	PruneNodes(deleteAfter time.Duration)
 
+	// Close closes the database connection
 	Close()
 }
 
 // Connect function with config to get DB connection interface
 type Connect func(config interface{}) (Connection, error)
 
-/*
- * for selfbinding in use of the package all
- */
-
+// Adapters is the list of registered database adapters
 var Adapters = map[string]Connect{}
 
-func AddDatabaseType(name string, n Connect) {
+func RegisterAdapter(name string, n Connect) {
 	Adapters[name] = n
 }
diff --git a/database/influxdb/database.go b/database/influxdb/database.go
index b509a78..b168308 100644
--- a/database/influxdb/database.go
+++ b/database/influxdb/database.go
@@ -49,7 +49,7 @@ func (c Config) Password() string {
 }
 
 func init() {
-	database.AddDatabaseType("influxdb", Connect)
+	database.RegisterAdapter("influxdb", Connect)
 }
 func Connect(configuration interface{}) (database.Connection, error) {
 	var config Config
@@ -80,7 +80,7 @@ func Connect(configuration interface{}) (database.Connection, error) {
 	return db, nil
 }
 
-func (conn *Connection) DeleteNode(deleteAfter time.Duration) {
+func (conn *Connection) PruneNodes(deleteAfter time.Duration) {
 	query := fmt.Sprintf("delete from %s where time < now() - %ds", MeasurementNode, deleteAfter/time.Second)
 	conn.client.Query(client.NewQuery(query, conn.config.Database(), "m"))
 }
diff --git a/database/internal.go b/database/internal.go
index 2a0aa94..5a5eb1c 100644
--- a/database/internal.go
+++ b/database/internal.go
@@ -31,7 +31,7 @@ func deleteWorker(conn Connection, deleteInterval time.Duration, deleteAfter tim
 	for {
 		select {
 		case <-ticker.C:
-			conn.DeleteNode(deleteAfter)
+			conn.PruneNodes(deleteAfter)
 		case <-quit:
 			ticker.Stop()
 			return
diff --git a/database/logging/file.go b/database/logging/file.go
index cfc5790..910a4d0 100644
--- a/database/logging/file.go
+++ b/database/logging/file.go
@@ -31,7 +31,7 @@ func (c Config) Path() string {
 }
 
 func init() {
-	database.AddDatabaseType("logging", Connect)
+	database.RegisterAdapter("logging", Connect)
 }
 
 func Connect(configuration interface{}) (database.Connection, error) {
@@ -56,8 +56,8 @@ func (conn *Connection) AddStatistics(stats *runtime.GlobalStats, time time.Time
 	conn.log("AddStatistics: [", time.String(), "] nodes: ", stats.Nodes, ", clients: ", stats.Clients, " models: ", len(stats.Models))
 }
 
-func (conn *Connection) DeleteNode(deleteAfter time.Duration) {
-	conn.log("DeleteNode")
+func (conn *Connection) PruneNodes(deleteAfter time.Duration) {
+	conn.log("PruneNodes")
 }
 
 func (conn *Connection) Close() {