makes variable as final

Author: otaviojava

arangodb-driver/src/test/java/org/jnosql/diana/arangodb/document/ArangoDBDocumentCollectionManagerFactorySupplier.java

@@ -25,7 +25,7 @@ enum  ArangoDBDocumentCollectionManagerFactorySupplier implements Supplier<Arang
 
     INSTANCE;
 
-    private GenericContainer arangodb =
+    private final GenericContainer arangodb =
             new GenericContainer("arangodb/arangodb:latest")
                     .withExposedPorts(8529)
                     .withEnv("ARANGO_NO_AUTH", "1")

arangodb-driver/src/test/java/org/jnosql/diana/arangodb/key/BucketManagerFactorySupplier.java

@@ -25,7 +25,7 @@ enum BucketManagerFactorySupplier implements Supplier<BucketManagerFactory> {
 
     INSTANCE;
 
-    private GenericContainer arangodb =
+    private final GenericContainer arangodb =
             new GenericContainer("arangodb/arangodb:latest")
                     .withExposedPorts(8529)
                     .withEnv("ARANGO_NO_AUTH", "1")

elasticsearch-driver/src/test/java/org/jnosql/diana/elasticsearch/document/ElasticsearchDocumentCollectionManagerFactorySupplier.java

@@ -26,7 +26,7 @@ enum ElasticsearchDocumentCollectionManagerFactorySupplier implements Supplier<E
 
 INSTACE;
 
-    private GenericContainer es =
+    private final GenericContainer es =
             new GenericContainer("docker.elastic.co/elasticsearch/elasticsearch:6.4.1")
                     .withExposedPorts(9200, 9300)
                     .withEnv("discovery.type", "single-node")

redis-driver/src/test/java/org/jnosql/diana/redis/key/RedisBucketManagerFactorySupplier.java

@@ -27,7 +27,7 @@
 public enum RedisBucketManagerFactorySupplier implements Supplier<RedisBucketManagerFactory> {
     INSTANCE;
 
-    private GenericContainer redis =
+    private final GenericContainer redis =
             new GenericContainer("redis:latest")
                     .withExposedPorts(6379)
                     .waitingFor(Wait.defaultWaitStrategy());