added capability to identify template engine names.

Author: HugoMario

modules/swagger-codegen/src/main/java/io/swagger/codegen/v3/templates/HandlebarTemplateEngine.java

@@ -25,6 +25,11 @@ public String getRendered(String templateFile, Map<String, Object> templateData)
         return hTemplate.apply(templateData);
     }
 
+    @Override
+    public String gerName() {
+        return CodegenConstants.HANDLEBARS_TEMPLATE_ENGINE;
+    }
+
     private com.github.jknack.handlebars.Template getHandlebars(String templateFile) throws IOException {
         templateFile = templateFile.replace(".mustache", StringUtils.EMPTY).replace("\\", "/");
         String templateDir = config.templateDir().replace(".mustache", StringUtils.EMPTY).replace("\\", "/");

modules/swagger-codegen/src/main/java/io/swagger/codegen/v3/templates/MustacheTemplateEngine.java

@@ -3,6 +3,7 @@
 import com.samskivert.mustache.Mustache;
 import com.samskivert.mustache.Template;
 import io.swagger.codegen.v3.CodegenConfig;
+import io.swagger.codegen.v3.CodegenConstants;
 import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -44,6 +45,11 @@ public String getRendered(String templateFile, Map<String, Object> templateData)
         return tmpl.execute(templateData);
     }
 
+    @Override
+    public String gerName() {
+        return CodegenConstants.MUSTACHE_TEMPLATE_ENGINE;
+    }
+
     public String readTemplate(String name) {
         Reader reader = getTemplateReader(name);
         try {

modules/swagger-codegen/src/main/java/io/swagger/codegen/v3/templates/TemplateEngine.java

@@ -6,4 +6,6 @@
 public interface TemplateEngine {
 
     String getRendered(String templateFile, Map<String, Object> templateData) throws IOException;
+
+    String gerName();
 }