Fix javadoc and suppress false-positive sonar warnings

src/main/java/com/kobylynskyi/graphql/codegen/mapper/ValueMapper.java

@@ -39,13 +39,20 @@ public class ValueMapper {
         return value.isValue() ? "true" : "false";
     }
 
-    //TODO It should also be abstracted. Different languages have different default values(It is now implemented in
-    // templates (templates are extremely complex))
+    /**
+     * Map value of GraphQL Int type to a value that will be present in a generated code.
+     * TODO: should also be abstracted because different languages have different default values
+     *
+     * @param mappingContext Global mapping context
+     * @param value          GraphQL Value
+     * @param graphQLType    GraphQL Type
+     * @return formatted value
+     */
     private static String mapInt(MappingContext mappingContext, IntValue value, Type<?> graphQLType) {
-        //default java basic type is `int`. so, default value like 123 that must wrap or append suffix `L` when it be
+        // default java basic type is `int`. so, default value like 123 that must wrap or append suffix `L` when it be
         // defined as `int` in graphql schema.
-        //`int` cannot assign to `Long`, also `double` cannot assign to `Float`, but graphql Float default mapping is
-        // Double in java, so, not modify `mapFloat`.
+        // `int` cannot assign to `Long`, also `double` cannot assign to `Float`, but graphql Float default mapping is
+        //  Double in java, so, not modify `mapFloat`.
         if (graphQLType instanceof TypeName) {
             String customType = mappingContext.getCustomTypesMapping().get("Long");
             String typeName = ((TypeName) graphQLType).getName();

src/main/java/com/kobylynskyi/graphql/codegen/model/MultiLanguageDeprecated.java

@@ -24,6 +24,7 @@ public class MultiLanguageDeprecated {
      * @param directive         GraphQL @deprecated directive
      * @return a definition of a deprecation having reason and annotation
      */
+    @SuppressWarnings({"java:S1133", "java:S1123"}) // sonar treats this is a deprecated method
     public static DeprecatedDefinition getLanguageDeprecated(GeneratedLanguage generatedLanguage, Directive directive) {
         String msg = null;
         if (directive.getArguments().stream().anyMatch(argument -> argument.getName().equals(REASON))) {