diff --git a/.mvn/jvm.config b/.mvn/jvm.config
new file mode 100644
index 0000000..8488a4f
--- /dev/null
+++ b/.mvn/jvm.config
@@ -0,0 +1,10 @@
+--add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED
+--add-exports jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED
+--add-exports jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED
+--add-exports jdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED
+--add-exports jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED
+--add-exports jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED
+--add-exports jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED
+--add-exports jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED
+--add-opens jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED
+--add-opens jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED
\ No newline at end of file
diff --git a/config/checkstyle.xml b/config/checkstyle.xml
new file mode 100644
index 0000000..985f500
--- /dev/null
+++ b/config/checkstyle.xml
@@ -0,0 +1,58 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN" "https://checkstyle.org/dtds/configuration_1_3.dtd">
+
+<!--
+    Derived Checkstyle configuration that checks the Google naming conventions from Google Java Style
+    that can be found at https://google.github.io/styleguide/javaguide.html Formatting conventions are
+    enforced by the spotless plugin.
+
+    This configuration is based on the Google Checks that can be found at:
+    https://github.com/checkstyle/checkstyle/blob/master/src/main/resources/google_checks.xml
+     
+ -->
+
+<module name="Checker">
+    <property name="charset" value="UTF-8" />
+    <property name="fileExtensions" value="java, properties, xml" />
+
+    <module name="SuppressWarningsFilter" />
+
+    <!-- Excludes all 'module-info.java' files              -->
+    <!-- See https://checkstyle.org/filefilters/index.html -->
+    <module name="BeforeExecutionExclusionFileFilter">
+        <property name="fileNamePattern" value="module\-info\.java$" />
+    </module>
+
+    <module name="TreeWalker">
+        <!-- Make the @SuppressWarnings annotations available to Checkstyle -->
+		<module name="SuppressWarningsHolder" />
+        <module name="AbstractClassName">
+            <property name="format" value="^(Base|Abstract).+$" />
+        </module>
+        <module name="MemberName">
+            <property name="format"
+                value="^(?!((m|s|my|our|the)[A-Z])[a-zA-Z0-9]*)([a-z][a-zA-Z0-9]*)$" />
+            <message key="name.invalidPattern"
+                value="Member ''{0}'' should be named with camelCase and without prefixes." />
+        </module>
+        <module name="ParameterName">
+            <property name="format"
+                value="^(?!((m|s|my|our|the)[A-Z])[a-zA-Z0-9]*)([a-z][a-zA-Z0-9]*)$" />
+            <message key="name.invalidPattern"
+                value="Member ''{0}'' should be named with camelCase and without prefixes." />
+        </module>
+        <module name="MethodName">
+            <property name="format"
+                value="^(?!((m|s|my|our|the)[A-Z])[a-zA-Z0-9]*)([a-z][a-zA-Z0-9]*)$" />
+            <message key="name.invalidPattern"
+                value="Member ''{0}'' should be named with camelCase and without prefixes." />
+        </module>
+        <module name="StaticVariableName">
+            <property name="format"
+                value="^(?!((m|s|my|our|the)[A-Z])[a-zA-Z0-9]*)([a-z][a-zA-Z0-9]*)$" />
+            <message key="name.invalidPattern"
+                value="Member ''{0}'' should be named with camelCase and without prefixes." />
+        </module>
+        <module name="NoFinalizer" />
+    </module>
+</module>
\ No newline at end of file
diff --git a/core/pom.xml b/core/pom.xml
index 371aa91..a522fd6 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -11,7 +11,7 @@
     <parent>
         <groupId>org.opencds.cqf.cql.ls</groupId>
         <artifactId>cql-ls</artifactId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.0.0</version>
     </parent>
 
     <dependencies>
diff --git a/debug/server/pom.xml b/debug/server/pom.xml
index 5270864..78e20eb 100644
--- a/debug/server/pom.xml
+++ b/debug/server/pom.xml
@@ -11,7 +11,7 @@
     <parent>
         <groupId>org.opencds.cqf.cql.ls</groupId>
         <artifactId>cql-ls</artifactId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.0.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
@@ -19,7 +19,7 @@
         <dependency>
             <groupId>org.opencds.cqf.cql.ls</groupId>
             <artifactId>cql-ls-core</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.0.0</version>
         </dependency>
         <dependency>
             <groupId>org.eclipse.lsp4j</groupId>
diff --git a/debug/service/pom.xml b/debug/service/pom.xml
index 7f3caf7..33befbf 100644
--- a/debug/service/pom.xml
+++ b/debug/service/pom.xml
@@ -10,7 +10,7 @@
     <parent>
         <groupId>org.opencds.cqf.cql.ls</groupId>
         <artifactId>cql-ls</artifactId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.0.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
@@ -18,7 +18,7 @@
         <dependency>
             <groupId>org.opencds.cqf.cql.debug</groupId>
             <artifactId>cql-debug-server</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.0.0</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
diff --git a/ls/server/pom.xml b/ls/server/pom.xml
index 65bcadc..39a0aa2 100644
--- a/ls/server/pom.xml
+++ b/ls/server/pom.xml
@@ -11,7 +11,7 @@
     <parent>
         <groupId>org.opencds.cqf.cql.ls</groupId>
         <artifactId>cql-ls</artifactId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.0.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
@@ -29,7 +29,7 @@
         <dependency>
             <groupId>org.opencds.cqf.cql.ls</groupId>
             <artifactId>cql-ls-core</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.0.0</version>
         </dependency>
 
         <dependency>
diff --git a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/Event.java b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/BaseEvent.java
similarity index 71%
rename from ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/Event.java
rename to ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/BaseEvent.java
index 16e8b5d..ff61e34 100644
--- a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/Event.java
+++ b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/BaseEvent.java
@@ -1,10 +1,10 @@
 package org.opencds.cqf.cql.ls.server.event;
 
-abstract class Event<T> {
+abstract class BaseEvent<T> {
 
     private T params;
 
-    protected Event(T params) {
+    protected BaseEvent(T params) {
         this.params = params;
     }
 
diff --git a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidChangeTextDocumentEvent.java b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidChangeTextDocumentEvent.java
index d4a38ab..7d1fc47 100644
--- a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidChangeTextDocumentEvent.java
+++ b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidChangeTextDocumentEvent.java
@@ -2,7 +2,7 @@
 
 import org.eclipse.lsp4j.DidChangeTextDocumentParams;
 
-public class DidChangeTextDocumentEvent extends Event<DidChangeTextDocumentParams> {
+public class DidChangeTextDocumentEvent extends BaseEvent<DidChangeTextDocumentParams> {
     public DidChangeTextDocumentEvent(DidChangeTextDocumentParams params) {
         super(params);
     }
diff --git a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidChangeWatchedFilesEvent.java b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidChangeWatchedFilesEvent.java
index 028d0ab..9b9cf2d 100644
--- a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidChangeWatchedFilesEvent.java
+++ b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidChangeWatchedFilesEvent.java
@@ -2,7 +2,7 @@
 
 import org.eclipse.lsp4j.DidChangeWatchedFilesParams;
 
-public class DidChangeWatchedFilesEvent extends Event<DidChangeWatchedFilesParams> {
+public class DidChangeWatchedFilesEvent extends BaseEvent<DidChangeWatchedFilesParams> {
     public DidChangeWatchedFilesEvent(DidChangeWatchedFilesParams params) {
         super(params);
     }
diff --git a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidCloseTextDocumentEvent.java b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidCloseTextDocumentEvent.java
index 57511d7..00ceaa1 100644
--- a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidCloseTextDocumentEvent.java
+++ b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidCloseTextDocumentEvent.java
@@ -2,7 +2,7 @@
 
 import org.eclipse.lsp4j.DidCloseTextDocumentParams;
 
-public class DidCloseTextDocumentEvent extends Event<DidCloseTextDocumentParams> {
+public class DidCloseTextDocumentEvent extends BaseEvent<DidCloseTextDocumentParams> {
     public DidCloseTextDocumentEvent(DidCloseTextDocumentParams params) {
         super(params);
     }
diff --git a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidOpenTextDocumentEvent.java b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidOpenTextDocumentEvent.java
index 8e33639..2e718fa 100644
--- a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidOpenTextDocumentEvent.java
+++ b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidOpenTextDocumentEvent.java
@@ -2,7 +2,7 @@
 
 import org.eclipse.lsp4j.DidOpenTextDocumentParams;
 
-public class DidOpenTextDocumentEvent extends Event<DidOpenTextDocumentParams> {
+public class DidOpenTextDocumentEvent extends BaseEvent<DidOpenTextDocumentParams> {
     public DidOpenTextDocumentEvent(DidOpenTextDocumentParams params) {
         super(params);
     }
diff --git a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidSaveTextDocumentEvent.java b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidSaveTextDocumentEvent.java
index 8d177a6..571e9a2 100644
--- a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidSaveTextDocumentEvent.java
+++ b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/event/DidSaveTextDocumentEvent.java
@@ -2,7 +2,7 @@
 
 import org.eclipse.lsp4j.DidSaveTextDocumentParams;
 
-public class DidSaveTextDocumentEvent extends Event<DidSaveTextDocumentParams> {
+public class DidSaveTextDocumentEvent extends BaseEvent<DidSaveTextDocumentParams> {
     public DidSaveTextDocumentEvent(DidSaveTextDocumentParams params) {
         super(params);
     }
diff --git a/ls/service/pom.xml b/ls/service/pom.xml
index 08cf5a6..03bc855 100644
--- a/ls/service/pom.xml
+++ b/ls/service/pom.xml
@@ -9,7 +9,7 @@
     <parent>
         <groupId>org.opencds.cqf.cql.ls</groupId>
         <artifactId>cql-ls</artifactId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.0.0</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
@@ -17,7 +17,7 @@
         <dependency>
             <groupId>org.opencds.cqf.cql.ls</groupId>
             <artifactId>cql-ls-server</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.0.0</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
diff --git a/plugin/debug/pom.xml b/plugin/debug/pom.xml
index 59cc32e..befde99 100644
--- a/plugin/debug/pom.xml
+++ b/plugin/debug/pom.xml
@@ -11,7 +11,7 @@
     <parent>
         <groupId>org.opencds.cqf.cql.ls</groupId>
         <artifactId>cql-ls</artifactId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.0.0</version>
         <relativePath>../..</relativePath>
     </parent>
 
@@ -19,13 +19,13 @@
         <dependency>
             <groupId>org.opencds.cqf.cql.ls</groupId>
             <artifactId>cql-ls-server</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.0.0</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>org.opencds.cqf.cql.debug</groupId>
             <artifactId>cql-debug-server</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.0.0</version>
         </dependency>
         <dependency>
             <groupId>org.eclipse.lsp4j</groupId>
diff --git a/plugin/debug/src/main/java/org/opencds/cqf/cql/ls/plugin/debug/DebugCommandContribution.java b/plugin/debug/src/main/java/org/opencds/cqf/cql/ls/plugin/debug/DebugCommandContribution.java
index 1e6f2e0..a6c128a 100644
--- a/plugin/debug/src/main/java/org/opencds/cqf/cql/ls/plugin/debug/DebugCommandContribution.java
+++ b/plugin/debug/src/main/java/org/opencds/cqf/cql/ls/plugin/debug/DebugCommandContribution.java
@@ -19,9 +19,6 @@ public class DebugCommandContribution implements CommandContribution {
 
     public DebugCommandContribution(CqlCompilationManager cqlCompilationManager) {
         this.cqlCompilationManager = cqlCompilationManager;
-
-        // Temporary hack for unused variable
-        this.cqlCompilationManager.hashCode();
     }
 
     @Override
diff --git a/pom.xml b/pom.xml
index 8dac735..79a8044 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
     <groupId>org.opencds.cqf.cql.ls</groupId>
     <artifactId>cql-ls</artifactId>
     <packaging>pom</packaging>
-    <version>3.0.0-SNAPSHOT</version>
+    <version>3.0.0</version>
 
     <name>CQL Language Server</name>
     <description>A Language Server for CQL implementing the LSP</description>
@@ -15,13 +15,16 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <cqf-fhir-cr.version>3.1.0-SNAPSHOT</cqf-fhir-cr.version>
+        <maven.compiler.release>11</maven.compiler.release>
+        <cqf-fhir-cr.version>3.1.0</cqf-fhir-cr.version>
         <auto-service.version>1.1.1</auto-service.version>
         <slf4j.version>1.7.36</slf4j.version>
         <spring.boot.version>2.7.18</spring.boot.version>
         <picocli.version>4.6.1</picocli.version>
         <jackson.version>2.16.1</jackson.version>
         <jackson.databind.version>2.16.0</jackson.databind.version>
+        <error-prone.version>2.24.1</error-prone.version>
+        <checkstyle.version>10.12.7</checkstyle.version>
     </properties>
 
     <modules>
@@ -209,8 +212,34 @@
         </dependency>
     </dependencies>
     <build>
+        <defaultGoal>package</defaultGoal>
         <pluginManagement>
             <plugins>
+                <plugin>
+                    <?m2e execute onConfiguration,onIncremental?>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-checkstyle-plugin</artifactId>
+                    <version>3.3.1</version>
+                    <configuration>
+                        <excludeGeneratedSources>true</excludeGeneratedSources>
+                        <configLocation>config/checkstyle.xml</configLocation>
+                    </configuration>
+                    <dependencies>
+                        <dependency>
+                            <groupId>com.puppycrawl.tools</groupId>
+                            <artifactId>checkstyle</artifactId>
+                            <version>${checkstyle.version}</version>
+                        </dependency>
+                    </dependencies>
+                    <executions>
+                        <execution>
+                            <phase>validate</phase>
+                            <goals>
+                                <goal>check</goal>
+                            </goals>
+                        </execution>
+                    </executions>
+                </plugin>
                 <plugin>
                     <groupId>org.springframework.boot</groupId>
                     <artifactId>spring-boot-maven-plugin</artifactId>
@@ -219,19 +248,14 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-compiler-plugin</artifactId>
-                    <version>3.10.0</version>
+                    <version>3.11.0</version>
                     <configuration>
-                        <release>11</release>
-                        <source>11</source>
-                        <target>11</target>
-                        <failOnError>true</failOnError>
                         <failOnWarning>true</failOnWarning>
                         <showWarnings>true</showWarnings>
                         <compilerArgs>
-                            <arg>-Xlint:all</arg>
-                            <arg>-Xlint:-processing</arg>
-                            <arg>-Werror</arg>
-                            <arg>-implicit:none</arg>
+                            <arg>-XDcompilePolicy=simple</arg>
+                            <!-- TODO: Ramp up error prone checkts to include warnings as well -->
+                            <arg>-Xplugin:ErrorProne -XepDisableAllWarnings</arg>
                         </compilerArgs>
                         <annotationProcessorPaths>
                             <path>
@@ -239,9 +263,33 @@
                                 <artifactId>auto-service</artifactId>
                                 <version>${auto-service.version}</version>
                             </path>
+                            <path>
+                                <groupId>com.google.errorprone</groupId>
+                                <artifactId>error_prone_core</artifactId>
+                                <version>${error-prone.version}</version>
+                            </path>
                         </annotationProcessorPaths>
                     </configuration>
                 </plugin>
+                <plugin>
+                    <groupId>org.jacoco</groupId>
+                    <artifactId>jacoco-maven-plugin</artifactId>
+                    <version>0.8.11</version>
+                    <executions>
+                        <execution>
+                            <goals>
+                                <goal>prepare-agent</goal>
+                            </goals>
+                        </execution>
+                        <execution>
+                            <id>report</id>
+                            <phase>prepare-package</phase>
+                            <goals>
+                                <goal>report</goal>
+                            </goals>
+                        </execution>
+                    </executions>
+                </plugin>
                 <plugin>
                     <groupId>com.diffplug.spotless</groupId>
                     <artifactId>spotless-maven-plugin</artifactId>
@@ -377,15 +425,15 @@
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-source-plugin</artifactId>
+                <artifactId>maven-compiler-plugin</artifactId>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-javadoc-plugin</artifactId>
+                <artifactId>maven-surefire-plugin</artifactId>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -394,10 +442,41 @@
         </plugins>
     </build>
     <profiles>
+        <profile>
+            <id>package</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-source-plugin</artifactId>
+                    </plugin>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-javadoc-plugin</artifactId>
+                    </plugin>
+                    <plugin>
+                        <groupId>org.jacoco</groupId>
+                        <artifactId>jacoco-maven-plugin</artifactId>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
         <profile>
             <id>release</id>
             <build>
                 <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-source-plugin</artifactId>
+                    </plugin>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-javadoc-plugin</artifactId>
+                    </plugin>
+                    <plugin>
+                        <groupId>org.jacoco</groupId>
+                        <artifactId>jacoco-maven-plugin</artifactId>
+                    </plugin>
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-enforcer-plugin</artifactId>