1 files changed, 4 insertions, 1 deletions
diff --git a/internal/mapr/logformat/custom2.go b/internal/mapr/logformat/custom2.go
index 262c721..a1a732b 100644
--- a/internal/mapr/logformat/custom2.go
+++ b/internal/mapr/logformat/custom2.go
@@ -2,15 +2,18 @@ package logformat
 
 import "errors"
 
+// ErrCustom2NotImplemented indicates custom2 parser is only a template.
 var ErrCustom2NotImplemented error = errors.New("custom2 log format is not implemented")
 
 // Template for creating a custom log format.
 type custom2Parser struct{}
 
+var _ Parser = (*custom2Parser)(nil)
+
 func newCustom2Parser(hostname, timeZoneName string, timeZoneOffset int) (*custom2Parser, error) {
 	return &custom2Parser{}, ErrCustom2NotImplemented
 }
 
-func (p *custom2Parser) MakeFields(maprLine string) (map[string]string, error) {
+func (p *custom2Parser) MakeFields(maprLine, _ string) (map[string]string, error) {
 	return nil, ErrCustom2NotImplemented
 }