Add protoc pom file to java directory

java/protoc/pom.xml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>com.google</groupId>
+    <artifactId>google</artifactId>
+    <version>1</version>
+  </parent>
+  <groupId>com.google.protobuf</groupId>
+  <artifactId>protoc</artifactId>
+  <version>3.21.2-rc1</version>
+  <packaging>pom</packaging>
+  <name>Protobuf Compiler</name>
+  <description>
+    Protobuf Compiler (protoc) is a compiler for .proto files. It generates
+    language-specific code for Protobuf messages and RPC interfaces.
+  </description>
+  <inceptionYear>2008</inceptionYear>
+  <url>https://developers.google.com/protocol-buffers/</url>
+  <licenses>
+    <license>
+      <name>BSD-3-Clause</name>
+      <url>https://opensource.org/licenses/BSD-3-Clause</url>
+      <distribution>repo</distribution>
+    </license>
+  </licenses>
+  <scm>
+    <url>https://github.com/protocolbuffers/protobuf</url>
+    <connection>
+      scm:git:https://github.com/protocolbuffers/protobuf.git
+    </connection>
+  </scm>
+</project>