Add dumpers

dump.go

@@ -0,0 +1,20 @@
+package main
+
+import "github.com/docker/docker/api/types"
+
+type Dumper interface {
+	Dump() error
+}
+
+func NewDumperFromContainer(container *types.ContainerJSON) Dumper {
+	switch container.Config.Image {
+	case "mysql":
+		fallthrough
+	case "mariadb":
+		return NewMysqlDumper(container)
+	case "postgres":
+		return NewPostgresDumper(container)
+	}
+
+	return nil
+}