Maintenance: add readme.java.md with tags (Azure#7801)

specification/maintenance/resource-manager/readme.java.md

@@ -0,0 +1,33 @@
+## Java
+
+These settings apply only when `--java` is specified on the command line.
+Please also specify `--azure-libraries-for-java-folder=<path to the root directory of your azure-libraries-for-java clone>`.
+
+``` yaml $(java)
+azure-arm: true
+fluent: true
+namespace: com.microsoft.azure.management.maintenance
+license-header: MICROSOFT_MIT_NO_CODEGEN
+payload-flattening-threshold: 1
+output-folder: $(azure-libraries-for-java-folder)/azure-mgmt-maintenance
+```
+
+### Java multi-api
+
+``` yaml $(java) && $(multiapi)
+batch:
+  - tag: package-2018-06-preview
+```
+
+### Tag: package-2018-06-preview and java
+
+These settings apply only when `--tag=package-2018-06-preview --java` is specified on the command line.
+Please also specify `--azure-libraries-for-java-folder=<path to the root directory of your azure-sdk-for-java clone>`.
+
+``` yaml $(tag) == 'package-2018-06-preview' && $(java) && $(multiapi)
+java:
+  namespace: com.microsoft.azure.management.maintenance.v2018_06_01_preview
+  output-folder: $(azure-libraries-for-java-folder)/maintenance/resource-manager/v2018_06_01_preview
+regenerate-manager: true
+generate-interface: true
+```

specification/maintenance/resource-manager/readme.md

@@ -106,18 +106,7 @@ See configuration in [readme.go.md](./readme.go.md)
 
 ## Java
 
-These settings apply only when `--java` is specified on the command line.
-Please also specify `--azure-libraries-for-java-folder=<path to the root directory of your azure-libraries-for-java clone>`.
-
-``` yaml $(java)
-java:
-  azure-arm: true
-  fluent: true
-  namespace: com.microsoft.azure.management.Maintenance
-  license-header: MICROSOFT_MIT_NO_CODEGEN
-  payload-flattening-threshold: 1
-  output-folder: $(azure-libraries-for-java-folder)/azure-mgmt-Maintenance
-```
+See configuration in [readme.java.md](./readme.java.md)
 
 ## Multi-API/Profile support for AutoRest v3 generators