feat: add Connection interface

.gitignore

@@ -6,4 +6,8 @@ __pycache__
 .settings
 .classpath
 .DS_Store
-
+.diff.txt
+.new-list.txt
+.org-list.txt
+SimpleBenchmarkApp/src/main/java/com/google/cloud/App.java
+.flattened-pom.xml

google-cloud-bigquery/clirr-ignored-differences.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- see http://www.mojohaus.org/clirr-maven-plugin/examples/ignored-differences.html -->
+<differences>
+  <!-- TODO: REMOVE AFTER RELEASE -->
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com/google/cloud/bigquery/BigQuery</className>
+    <method>com.google.cloud.bigquery.Connection createConnection(com.google.cloud.bigquery.ConnectionSettings)</method>
+  </difference>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com/google/cloud/bigquery/spi/v2/BigQueryRpc</className>
+    <method>com.google.api.services.bigquery.model.Job createJobForQuery(com.google.api.services.bigquery.model.Job)</method>
+  </difference>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com/google/cloud/bigquery/spi/v2/BigQueryRpc</className>
+    <method>com.google.api.services.bigquery.model.Job getQueryJob(java.lang.String, java.lang.String, java.lang.String)</method>
+  </difference>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com/google/cloud/bigquery/spi/v2/BigQueryRpc</className>
+    <method>com.google.api.services.bigquery.model.GetQueryResultsResponse getQueryResultsWithRowLimit(java.lang.String, java.lang.String, java.lang.String, java.lang.Long)</method>
+  </difference>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com/google/cloud/bigquery/spi/v2/BigQueryRpc</className>
+    <method>com.google.api.services.bigquery.model.TableDataList listTableDataWithRowLimit(java.lang.String, java.lang.String, java.lang.String, java.lang.Long)</method>
+  </difference>
+</differences>