separate modules

Author: jackye1995

java/lance-namespace-hive2/pom.xml

@@ -96,6 +96,56 @@
         </exclusions>
         <classifier>core</classifier>
       </dependency>
+      
+      <!-- Use Hadoop version compatible with Hive 2.3.9 - needs 2.8.x+ for getPassword method -->
+      <dependency>
+        <groupId>org.apache.hadoop</groupId>
+        <artifactId>hadoop-common</artifactId>
+        <version>2.8.5</version>
+        <scope>test</scope>
+        <exclusions>
+          <exclusion>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+          </exclusion>
+        </exclusions>
+      </dependency>
+      <dependency>
+        <groupId>org.apache.hadoop</groupId>
+        <artifactId>hadoop-hdfs</artifactId>
+        <version>2.8.5</version>
+        <scope>test</scope>
+        <exclusions>
+          <exclusion>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+          </exclusion>
+        </exclusions>
+      </dependency>
+      <dependency>
+        <groupId>org.apache.derby</groupId>
+        <artifactId>derby</artifactId>
+        <version>10.14.2.0</version>
+        <scope>test</scope>
+      </dependency>
+      <dependency>
+        <groupId>org.datanucleus</groupId>
+        <artifactId>datanucleus-core</artifactId>
+        <version>4.1.17</version>
+        <scope>test</scope>
+      </dependency>
+      <dependency>
+        <groupId>org.datanucleus</groupId>
+        <artifactId>datanucleus-api-jdo</artifactId>
+        <version>4.2.4</version>
+        <scope>test</scope>
+      </dependency>
+      <dependency>
+        <groupId>org.datanucleus</groupId>
+        <artifactId>datanucleus-rdbms</artifactId>
+        <version>4.1.19</version>
+        <scope>test</scope>
+      </dependency>
 
       <dependency>
         <groupId>com.lancedb</groupId>

java/lance-namespace-hive2/src/test/java/com/lancedb/lance/namespace/hive2/TestHive2Namespace.java

@@ -78,8 +78,10 @@ public static void teardown() throws Exception {
       metastore.stop();
     }
 
-    File file = new File(tmpDirBase);
-    file.delete();
+    if (tmpDirBase != null) {
+      File file = new File(tmpDirBase);
+      file.delete();
+    }
   }
 
   @AfterEach