public void setMaterialsDescription(Map<String, String> materialsDescription) {
        this.materialsDescription = materialsDescription == null
                ? null
                : Collections.unmodifiableMap(new HashMap<String,String>(materialsDescription))
                ;
    }
sets the materials description for the encryption materials to be used with the current PutObjectRequest.
@param materialsDescription the materialsDescription to set
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/EncryptedPutObjectRequest.java