diff --git a/internal/cnf/nginx.go b/internal/cnf/nginx.go
index a2e2581..bdf6f2c 100644
--- a/internal/cnf/nginx.go
+++ b/internal/cnf/nginx.go
@@ -38,7 +38,7 @@ func (d *nginx) WriteTo(_writer io.Writer) (int64, error) {
 // if <create> is true, create if does not exist
 func (d *nginx) browse(_path string, create ...bool) (*lib.Line, bool) {
 
-	must_create := len(create) > 0 && create[0]
+	mustCreate := len(create) > 0 && create[0]
 
 	// 1. extract path
 	path := strings.Split(_path, ".")
@@ -49,7 +49,7 @@ func (d *nginx) browse(_path string, create ...bool) (*lib.Line, bool) {
 	}
 
 	// 3. init output chain
-	var current *lib.Line = d.data
+	current := d.data
 
 	// 4. iterate over path / nested fields
 	l := len(path)
@@ -71,7 +71,7 @@ func (d *nginx) browse(_path string, create ...bool) (*lib.Line, bool) {
 			}
 
 			// create section
-			if must_create {
+			if mustCreate {
 				sec := &lib.Line{
 					Type:       lib.SECTION,
 					Components: []string{field},
@@ -93,7 +93,7 @@ func (d *nginx) browse(_path string, create ...bool) (*lib.Line, bool) {
 		}
 
 		// create assignment
-		if must_create {
+		if mustCreate {
 			assignment := &lib.Line{
 				Type:       lib.ASSIGNMENT,
 				Components: []string{field, ""},
diff --git a/internal/cnf/parser/nginx/decoder.go b/internal/cnf/parser/nginx/decoder.go
index 4af5ac4..2cc8f79 100644
--- a/internal/cnf/parser/nginx/decoder.go
+++ b/internal/cnf/parser/nginx/decoder.go
@@ -7,10 +7,11 @@ import (
 	"strings"
 )
 
-// decoder implements parser.Decoder
-type decoder struct{ reader io.Reader }
+// Decoder implements parser.Decoder
+type Decoder struct{ reader io.Reader }
 
-func (d *decoder) Decode(v interface{}) error {
+// Decode is the main function of the parser.Decoder interface
+func (d *Decoder) Decode(v interface{}) error {
 
 	// check 'v'
 	if v == nil {
diff --git a/internal/cnf/parser/nginx/encoder.go b/internal/cnf/parser/nginx/encoder.go
index 567e1a9..104d51f 100644
--- a/internal/cnf/parser/nginx/encoder.go
+++ b/internal/cnf/parser/nginx/encoder.go
@@ -10,14 +10,16 @@ var (
 	defaultIndent = "\t"
 )
 
-// encoder implements parser.Encoder
-type encoder struct {
+// Encoder implements parser.Encoder
+type Encoder struct {
 	writer io.Writer
 	prefix []byte
 	indent []byte
 }
 
-func (e *encoder) SetIndent(prefix, indent string) {
+// SetIndent with the <prefix> that begins each line (default is emptys string)
+// and the <indent> string repeated for each indentation level (default is tab '\t')
+func (e *Encoder) SetIndent(prefix, indent string) {
 	e.prefix = make([]byte, 0)
 	e.prefix = append(e.prefix, []byte(prefix)...)
 
@@ -25,7 +27,8 @@ func (e *encoder) SetIndent(prefix, indent string) {
 	e.indent = append(e.indent, []byte(indent)...)
 }
 
-func (e *encoder) Encode(v interface{}) error {
+// Encode is the main function of the parser.Encoder interface
+func (e *Encoder) Encode(v interface{}) error {
 
 	// default indentation
 	if e.prefix == nil || e.indent == nil {
diff --git a/internal/cnf/parser/nginx/nginx.go b/internal/cnf/parser/nginx/nginx.go
index 9ac9b87..cec8618 100644
--- a/internal/cnf/parser/nginx/nginx.go
+++ b/internal/cnf/parser/nginx/nginx.go
@@ -5,11 +5,11 @@ import (
 )
 
 // NewDecoder implements parser.T
-func NewDecoder(r io.Reader) *decoder {
-	return &decoder{reader: r}
+func NewDecoder(r io.Reader) *Decoder {
+	return &Decoder{reader: r}
 }
 
 // NewEncoder implements parser.T
-func NewEncoder(w io.Writer) *encoder {
-	return &encoder{writer: w}
+func NewEncoder(w io.Writer) *Encoder {
+	return &Encoder{writer: w}
 }