[eclipse/xtext#1249] use bom for version management (#988)

build.gradle

@@ -10,6 +10,7 @@ buildscript {
 	repositories.jcenter()
 	dependencies {
 		classpath "org.xtext:xtext-gradle-plugin:$versions.xtext_gradle_plugin"
+		classpath "io.spring.gradle:dependency-management-plugin:$versions.dependency_management_plugin"
 	}
 }
 
@@ -27,6 +28,12 @@ subprojects {
 	version = rootProject.version
 	
 	apply plugin: 'java'
+	apply plugin: 'io.spring.dependency-management'
+	dependencyManagement {
+		imports {
+			mavenBom "org.eclipse.xtext:xtext-dev-bom:$project.version"
+		}
+	}
 	if (findProperty('compileXtend') == 'true') {
 		apply plugin: 'org.xtext.xtend'
 	}

gradle/bootstrap-setup.gradle

@@ -21,8 +21,6 @@ configurations {
 			eachDependency {
 				if (requested.group == 'org.eclipse.xtext' || requested.group == 'org.eclipse.xtend')
 					useVersion(versions.xtext_bootstrap)
-				if (requested.group == 'com.google.inject' && requested.name == 'guice')
-					useVersion(versions.guice)
 			}
 		}
 		exclude group: 'asm'

gradle/mwe2-workflows.gradle

@@ -12,7 +12,7 @@ dependencies {
 	if (!name.endsWith('bootstrap')) {
 		mwe2Compile project(':org.eclipse.xtext.xtext.generator')
 	}
-	mwe2Runtime "org.eclipse.emf:org.eclipse.emf.mwe2.launch:$versions.emfMwe2"
+	mwe2Runtime 'org.eclipse.emf:org.eclipse.emf.mwe2.launch'
 	mwe2Runtime "org.eclipse.xtext:org.eclipse.xtext.common.types:$versions.xtext_bootstrap"
 	mwe2Runtime "org.eclipse.xtext:org.eclipse.xtext.ecore:$versions.xtext_bootstrap"
 }

gradle/versions.gradle

@@ -9,29 +9,5 @@ ext.versions = [
 	'xtext_bootstrap': '2.16.0',
 	'gradle_plugins': '0.1.0',
 	'xtext_gradle_plugin': '2.0.2',
-	// When adjusting the `lsp4j` version here, do not forget to do the followings:
+	'dependency_management_plugin' : '1.0.6.RELEASE'
-	// - Update the version in `IdeProjectDescriptor#pom`.
-	// - Update the test expectations by running `CliWizardIntegrationTest#main`.
-	// - Update the versions in the `/org.eclipse.xtext.ide/META-INF/MANIFEST.MF` and `/org.eclipse.xtext.ide.tests/META-INF/MANIFEST.MF` files.
-	'lsp4j': '0.6.0',
-	'log4j': '1.2.16',
-	'equinoxCommon' : '3.9.0',
-	'equinoxRegistry' : '3.7.0',
-	'eclipseCore': '3.13.0',
-	'eclipseOSGI' : '3.12.100',
-	'emfCommon': '2.12.0',
-	'emfEcore': '2.12.0',
-	'emfChange': '2.11.0',
-	'emfCodegen': '2.11.0',
-	'emfMwe': '1.3.21.201705291010',
-	'emfMwe2': '2.9.1.201705291010',
-	'jdtCore': '3.13.102',
-	'xpand': '2.0.0',
-	'guice': '3.0',
-	'antlr': '3.2',
-	'asm': '7.0',
-	'icu': '52.1',
-	'junit': '4.12',
-	'junit5': '5.1.0',
-	'args4j': '2.33'
 ]

org.eclipse.xtext.ide.tests/build.gradle

@@ -5,9 +5,9 @@ dependencies {
 	compile project(':org.eclipse.xtext.testing')
 	compile project(':org.eclipse.xtext.testlanguages')
 	compile project(':org.eclipse.xtext.testlanguages.ide')
-	compile "junit:junit:$versions.junit"
+	compile 'junit:junit'
-	compile "org.eclipse.lsp4j:org.eclipse.lsp4j:$versions.lsp4j"
+	compile 'org.eclipse.lsp4j:org.eclipse.lsp4j'
-	compile "org.eclipse.emf:org.eclipse.emf.ecore.change:$versions.emfChange"
+	compile 'org.eclipse.emf:org.eclipse.emf.ecore.change'
 }
 
 sourceSets.test.java {

org.eclipse.xtext.ide/build.gradle

@@ -3,6 +3,6 @@ description = 'Platform-independent language support.'
 
 dependencies {
 	compile project(':org.eclipse.xtext')
-	compile "org.eclipse.emf:org.eclipse.emf.ecore.change:$versions.emfChange"
+	compile 'org.eclipse.emf:org.eclipse.emf.ecore.change'
-	compile "org.eclipse.lsp4j:org.eclipse.lsp4j:$versions.lsp4j"
+	compile 'org.eclipse.lsp4j:org.eclipse.lsp4j'
 }

org.eclipse.xtext.testing/build.gradle

@@ -4,10 +4,10 @@ description = 'Infrastructure for testing Xtext languages (supersedes org.eclips
 dependencies {
 	compile project(':org.eclipse.xtext')
 	compile project(':org.eclipse.xtext.ide')
-	compile "org.eclipse.lsp4j:org.eclipse.lsp4j:$versions.lsp4j"
+	compile 'org.eclipse.lsp4j:org.eclipse.lsp4j'
-	optional "junit:junit:$versions.junit"
+	optional 'junit:junit'
-	optional "org.junit.jupiter:junit-jupiter-api:$versions.junit5"
+	optional 'org.junit.jupiter:junit-jupiter-api'
-	optional "org.junit.jupiter:junit-jupiter-engine:$versions.junit5"
+	optional 'org.junit.jupiter:junit-jupiter-engine'
 }
 
 sourceSets.test.java.srcDir 'tests'

org.eclipse.xtext.testlanguages/build.gradle

@@ -3,11 +3,9 @@ apply from: "${rootDir}/gradle/mwe2-workflows.gradle"
 dependencies {
 	compile project(':org.eclipse.xtext')
 	compile project(':org.eclipse.xtext.testing')
-	compile "org.eclipse.platform:org.eclipse.equinox.common:$versions.equinoxCommon"
+	compile 'org.eclipse.platform:org.eclipse.equinox.common'
-	compile("org.eclipse.platform:org.eclipse.core.runtime:$versions.eclipseCore") {
+	compile 'org.eclipse.platform:org.eclipse.core.runtime'
-		exclude group: "org.eclipse.platform", module: "org.eclipse.equinox.common"
+	compile 'org.eclipse.emf:org.eclipse.emf.mwe2.runtime'
-	}
-	compile "org.eclipse.emf:org.eclipse.emf.mwe2.runtime:$versions.emfMwe2"
 }
 
 // Include the mwe2 and xtext files from the main source set when executing the workflow

org.eclipse.xtext.tests/build.gradle

@@ -5,13 +5,13 @@ dependencies {
 	compile project(':org.eclipse.xtext.xtext.generator')
 	compile project(':org.eclipse.xtext.xtext.wizard')
 	compile project(':org.eclipse.xtext.testlanguages')
-	compile "junit:junit:$versions.junit"
+	compile 'junit:junit'
-	compile "org.eclipse.emf:org.eclipse.emf.common:$versions.emfCommon"
+	compile 'org.eclipse.emf:org.eclipse.emf.common'
-	compile "org.eclipse.emf:org.eclipse.emf.ecore.xmi:$versions.emfEcore"
+	compile 'org.eclipse.emf:org.eclipse.emf.ecore.xmi'
 	optional files('lib/simple.jar')
 	// The MWE2 workflow depends on emf-gen, so we have to include it in the test dependencies
 	testCompile sourceSets.mwe2.output
-	testCompile "args4j:args4j:$versions.args4j"
+	testCompile 'args4j:args4j'
 }
 
 sourceSets.test {

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.full/org.xtext.example.full.parent/build.gradle

@@ -4,6 +4,7 @@ buildscript {
 	}
 	dependencies {
 		classpath 'org.xtext:xtext-gradle-plugin:2.0.2'
+		classpath 'io.spring.gradle:dependency-management-plugin:1.0.6.RELEASE'
 	}
 }
 
@@ -14,6 +15,12 @@ subprojects {
 	}
 	
 	apply plugin: 'java'
+	apply plugin: 'io.spring.dependency-management'
+	dependencyManagement {
+		imports {
+			mavenBom "org.eclipse.xtext:xtext-dev-bom:unspecified"
+		}
+	}
 	apply plugin: 'org.xtext.xtend'
 	apply from: "${rootDir}/gradle/source-layout.gradle"
 	apply from: "${rootDir}/gradle/maven-deployment.gradle"

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.full/org.xtext.example.full.parent/pom.xml

@@ -28,6 +28,17 @@
 		<module>org.xtext.example.full.repository</module>
 		<module>org.xtext.example.full.ui.tests</module>
 	</modules>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.eclipse.xtext</groupId>
+				<artifactId>xtext-dev-bom</artifactId>
+				<version>${xtextVersion}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
 	<build>
 		<plugins>
 			<plugin>

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.gradle/org.xtext.example.gradle.parent/build.gradle

@@ -4,6 +4,7 @@ buildscript {
 	}
 	dependencies {
 		classpath 'org.xtext:xtext-gradle-plugin:2.0.2'
+		classpath 'io.spring.gradle:dependency-management-plugin:1.0.6.RELEASE'
 	}
 }
 
@@ -14,6 +15,12 @@ subprojects {
 	}
 	
 	apply plugin: 'java'
+	apply plugin: 'io.spring.dependency-management'
+	dependencyManagement {
+		imports {
+			mavenBom "org.eclipse.xtext:xtext-dev-bom:unspecified"
+		}
+	}
 	apply plugin: 'org.xtext.xtend'
 	apply from: "${rootDir}/gradle/source-layout.gradle"
 	apply from: "${rootDir}/gradle/maven-deployment.gradle"

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleApp/org.xtext.example.lsGradleApp.parent/build.gradle

@@ -4,6 +4,7 @@ buildscript {
 	}
 	dependencies {
 		classpath 'org.xtext:xtext-gradle-plugin:2.0.2'
+		classpath 'io.spring.gradle:dependency-management-plugin:1.0.6.RELEASE'
 	}
 }
 
@@ -14,6 +15,12 @@ subprojects {
 	}
 	
 	apply plugin: 'java'
+	apply plugin: 'io.spring.dependency-management'
+	dependencyManagement {
+		imports {
+			mavenBom "org.eclipse.xtext:xtext-dev-bom:unspecified"
+		}
+	}
 	apply plugin: 'org.xtext.xtend'
 	apply from: "${rootDir}/gradle/source-layout.gradle"
 	apply from: "${rootDir}/gradle/maven-deployment.gradle"

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleFatjar/org.xtext.example.lsGradleFatjar.parent/build.gradle

@@ -4,6 +4,7 @@ buildscript {
 	}
 	dependencies {
 		classpath 'org.xtext:xtext-gradle-plugin:2.0.2'
+		classpath 'io.spring.gradle:dependency-management-plugin:1.0.6.RELEASE'
 	}
 }
 
@@ -14,6 +15,12 @@ subprojects {
 	}
 	
 	apply plugin: 'java'
+	apply plugin: 'io.spring.dependency-management'
+	dependencyManagement {
+		imports {
+			mavenBom "org.eclipse.xtext:xtext-dev-bom:unspecified"
+		}
+	}
 	apply plugin: 'org.xtext.xtend'
 	apply from: "${rootDir}/gradle/source-layout.gradle"
 	apply from: "${rootDir}/gradle/maven-deployment.gradle"

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenApp/org.xtext.example.lsMavenApp.parent/pom.xml

@@ -16,6 +16,17 @@
 		<module>org.xtext.example.lsMavenApp</module>
 		<module>org.xtext.example.lsMavenApp.ide</module>
 	</modules>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.eclipse.xtext</groupId>
+				<artifactId>xtext-dev-bom</artifactId>
+				<version>${xtextVersion}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
 	<build>
 		<pluginManagement>
 			<plugins>

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenFatjar/org.xtext.example.lsMavenFatjar.parent/pom.xml

@@ -16,6 +16,17 @@
 		<module>org.xtext.example.lsMavenFatjar</module>
 		<module>org.xtext.example.lsMavenFatjar.ide</module>
 	</modules>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.eclipse.xtext</groupId>
+				<artifactId>xtext-dev-bom</artifactId>
+				<version>${xtextVersion}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
 	<build>
 		<pluginManagement>
 			<plugins>

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoApp/org.xtext.example.lsMavenTychoApp.parent/pom.xml

@@ -25,6 +25,17 @@
 		<module>org.xtext.example.lsMavenTychoApp.ui</module>
 		<module>org.xtext.example.lsMavenTychoApp.target</module>
 	</modules>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.eclipse.xtext</groupId>
+				<artifactId>xtext-dev-bom</artifactId>
+				<version>${xtextVersion}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
 	<build>
 		<plugins>
 			<plugin>

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoFatjar/org.xtext.example.lsMavenTychoFatjar.parent/pom.xml

@@ -25,6 +25,17 @@
 		<module>org.xtext.example.lsMavenTychoFatjar.ui</module>
 		<module>org.xtext.example.lsMavenTychoFatjar.target</module>
 	</modules>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.eclipse.xtext</groupId>
+				<artifactId>xtext-dev-bom</artifactId>
+				<version>${xtextVersion}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
 	<build>
 		<plugins>
 			<plugin>

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTycho/org.xtext.example.mavenTycho.parent/pom.xml

@@ -28,6 +28,17 @@
 		<module>org.xtext.example.mavenTycho.tests</module>
 		<module>org.xtext.example.mavenTycho.ui.tests</module>
 	</modules>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.eclipse.xtext</groupId>
+				<artifactId>xtext-dev-bom</artifactId>
+				<version>${xtextVersion}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
 	<build>
 		<plugins>
 			<plugin>

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTychoJ9/org.xtext.example.mavenTychoJ9.parent/pom.xml

@@ -28,6 +28,17 @@
 		<module>org.xtext.example.mavenTychoJ9.tests</module>
 		<module>org.xtext.example.mavenTychoJ9.ui.tests</module>
 	</modules>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.eclipse.xtext</groupId>
+				<artifactId>xtext-dev-bom</artifactId>
+				<version>${xtextVersion}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
 	<build>
 		<plugins>
 			<plugin>

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.mavenTychoP2/org.xtext.example.mavenTychoP2.parent/pom.xml

@@ -30,6 +30,17 @@
 		<module>org.xtext.example.mavenTychoP2.tests</module>
 		<module>org.xtext.example.mavenTychoP2.ui.tests</module>
 	</modules>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.eclipse.xtext</groupId>
+				<artifactId>xtext-dev-bom</artifactId>
+				<version>${xtextVersion}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
 	<build>
 		<plugins>
 			<plugin>

org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.plainMaven/org.xtext.example.plainMaven.parent/pom.xml

@@ -17,6 +17,17 @@
 		<module>org.xtext.example.plainMaven.ide</module>
 		<module>org.xtext.example.plainMaven.web</module>
 	</modules>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.eclipse.xtext</groupId>
+				<artifactId>xtext-dev-bom</artifactId>
+				<version>${xtextVersion}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
 	<build>
 		<pluginManagement>
 			<plugins>

org.eclipse.xtext.util/build.gradle

@@ -3,10 +3,10 @@ description = 'Utility classes used throughout Xtext.'
 
 dependencies {
 	compile "org.eclipse.xtend:org.eclipse.xtend.lib:$versions.xtext"
-	compile "log4j:log4j:$versions.log4j"
+	compile 'log4j:log4j'
-	compile "org.eclipse.emf:org.eclipse.emf.common:$versions.emfCommon"
+	compile 'org.eclipse.emf:org.eclipse.emf.common'
-	compile "org.eclipse.emf:org.eclipse.emf.ecore:$versions.emfEcore"
+	compile 'org.eclipse.emf:org.eclipse.emf.ecore'
-	compile "com.google.inject:guice:$versions.guice"
+	compile 'com.google.inject:guice'
 }
 
 // Set the value of the Maven-Version attribute

org.eclipse.xtext.xtext.generator/build.gradle

@@ -3,17 +3,12 @@ description = 'Generator for infrastructure of Xtext languages (supersedes org.e
 
 dependencies {
 	compile project(':org.eclipse.xtext')
-	compile "org.eclipse.emf:org.eclipse.emf.codegen:$versions.emfCodegen"
+	compile 'org.eclipse.emf:org.eclipse.emf.codegen'
-	compile "org.eclipse.emf:org.eclipse.emf.codegen.ecore:$versions.emfEcore"
+	compile 'org.eclipse.emf:org.eclipse.emf.codegen.ecore'
-	compile "org.eclipse.emf:org.eclipse.emf.mwe.utils:$versions.emfMwe"
+	compile 'org.eclipse.emf:org.eclipse.emf.mwe.utils'
-	compile "org.eclipse.emf:org.eclipse.emf.mwe2.lib:$versions.emfMwe2"
+	compile 'org.eclipse.emf:org.eclipse.emf.mwe2.lib'
-	compile "com.ibm.icu:icu4j:$versions.icu"
+	compile 'com.ibm.icu:icu4j'
-	compile "org.eclipse.platform:org.eclipse.equinox.common:$versions.equinoxCommon"
+	compile 'org.eclipse.platform:org.eclipse.equinox.common'
-	optional("org.eclipse.platform:org.eclipse.core.runtime:$versions.eclipseCore") {
+	optional 'org.eclipse.platform:org.eclipse.core.runtime'
-		exclude group: "org.eclipse.platform", module: "org.eclipse.equinox.common"
+	optional 'org.eclipse.jdt:org.eclipse.jdt.core'
-	}
-	optional("org.eclipse.jdt:org.eclipse.jdt.core:$versions.jdtCore") {
-		exclude group: "org.eclipse.platform", module: "org.eclipse.equinox.common"
-		exclude group: "org.eclipse.platform", module: "org.eclipse.core.runtime"
-	}
 }

org.eclipse.xtext.xtext.wizard/build.gradle

@@ -3,7 +3,7 @@ description = 'Platform-independent component for creating new Xtext projects.'
 
 dependencies {
 	compile project(':org.eclipse.xtext')
-	optional "args4j:args4j:$versions.args4j"
+	optional 'args4j:args4j'
 }
 
 sourceSets.main.resources.srcDir 'resources'

org.eclipse.xtext.xtext.wizard/src/org/eclipse/xtext/xtext/wizard/ParentProjectDescriptor.xtend

@@ -85,6 +85,7 @@ class ParentProjectDescriptor extends ProjectDescriptor {
 					}
 					dependencies {
 						classpath 'org.xtext:xtext-gradle-plugin:«config.xtextVersion.xtextGradlePluginVersion»'
+						classpath 'io.spring.gradle:dependency-management-plugin:1.0.6.RELEASE'
 					}
 				}
 				
@@ -100,6 +101,12 @@ class ParentProjectDescriptor extends ProjectDescriptor {
 					}
 					
 					apply plugin: 'java'
+					apply plugin: 'io.spring.dependency-management'
+					dependencyManagement {
+						imports {
+							mavenBom "org.eclipse.xtext:xtext-dev-bom:«config.xtextVersion»"
+						}
+					}
 					apply plugin: 'org.xtext.xtend'
 					apply from: "${rootDir}/gradle/source-layout.gradle"
 					apply from: "${rootDir}/gradle/maven-deployment.gradle"
@@ -228,6 +235,17 @@ class ParentProjectDescriptor extends ProjectDescriptor {
 						<module>«IF config.projectLayout == ProjectLayout.FLAT»../«ENDIF»«p.name»</module>
 					«ENDFOR»
 				</modules>
+				<dependencyManagement>
+					<dependencies>
+						<dependency>
+							<groupId>org.eclipse.xtext</groupId>
+							<artifactId>xtext-dev-bom</artifactId>
+							<version>${xtextVersion}</version>
+							<type>pom</type>
+							<scope>import</scope>
+						</dependency>
+					</dependencies>
+				</dependencyManagement>
 				<build>
 					«IF config.needsTychoBuild»
 						<plugins>

org.eclipse.xtext.xtext.wizard/src/org/eclipse/xtext/xtext/wizard/PomFile.xtend

@@ -54,7 +54,9 @@ class PomFile extends TextFile {
 						<dependency>
 							<groupId>«dep.groupId»</groupId>
 							<artifactId>«dep.artifactId»</artifactId>
-							<version>«dep.version»</version>
+							«IF dep.version !== null»
+								<version>«dep.version»</version>
+							«ENDIF»
 							«IF dep.scope != Scope.COMPILE»
 								<scope>«dep.scope.mavenNotation»</scope>
 							«ENDIF»

org.eclipse.xtext.xtext.wizard/xtend-gen/org/eclipse/xtext/xtext/wizard/ParentProjectDescriptor.java

@@ -153,6 +153,9 @@ public class ParentProjectDescriptor extends ProjectDescriptor {
       _builder.append(_xtextGradlePluginVersion, "\t\t");
       _builder.append("\'");
       _builder.newLineIfNotEmpty();
+      _builder.append("\t\t");
+      _builder.append("classpath \'io.spring.gradle:dependency-management-plugin:1.0.6.RELEASE\'");
+      _builder.newLine();
       _builder.append("\t");
       _builder.append("}");
       _builder.newLine();
@@ -197,6 +200,27 @@ public class ParentProjectDescriptor extends ProjectDescriptor {
       _builder.append("apply plugin: \'java\'");
       _builder.newLine();
       _builder.append("\t");
+      _builder.append("apply plugin: \'io.spring.dependency-management\'");
+      _builder.newLine();
+      _builder.append("\t");
+      _builder.append("dependencyManagement {");
+      _builder.newLine();
+      _builder.append("\t\t");
+      _builder.append("imports {");
+      _builder.newLine();
+      _builder.append("\t\t\t");
+      _builder.append("mavenBom \"org.eclipse.xtext:xtext-dev-bom:");
+      XtextVersion _xtextVersion_1 = this.getConfig().getXtextVersion();
+      _builder.append(_xtextVersion_1, "\t\t\t");
+      _builder.append("\"");
+      _builder.newLineIfNotEmpty();
+      _builder.append("\t\t");
+      _builder.append("}");
+      _builder.newLine();
+      _builder.append("\t");
+      _builder.append("}");
+      _builder.newLine();
+      _builder.append("\t");
       _builder.append("apply plugin: \'org.xtext.xtend\'");
       _builder.newLine();
       _builder.append("\t");
@@ -634,6 +658,37 @@ public class ParentProjectDescriptor extends ProjectDescriptor {
       }
       _builder.append("</modules>");
       _builder.newLine();
+      _builder.append("<dependencyManagement>");
+      _builder.newLine();
+      _builder.append("\t");
+      _builder.append("<dependencies>");
+      _builder.newLine();
+      _builder.append("\t\t");
+      _builder.append("<dependency>");
+      _builder.newLine();
+      _builder.append("\t\t\t");
+      _builder.append("<groupId>org.eclipse.xtext</groupId>");
+      _builder.newLine();
+      _builder.append("\t\t\t");
+      _builder.append("<artifactId>xtext-dev-bom</artifactId>");
+      _builder.newLine();
+      _builder.append("\t\t\t");
+      _builder.append("<version>${xtextVersion}</version>");
+      _builder.newLine();
+      _builder.append("\t\t\t");
+      _builder.append("<type>pom</type>");
+      _builder.newLine();
+      _builder.append("\t\t\t");
+      _builder.append("<scope>import</scope>");
+      _builder.newLine();
+      _builder.append("\t\t");
+      _builder.append("</dependency>");
+      _builder.newLine();
+      _builder.append("\t");
+      _builder.append("</dependencies>");
+      _builder.newLine();
+      _builder.append("</dependencyManagement>");
+      _builder.newLine();
       _builder.append("<build>");
       _builder.newLine();
       {

org.eclipse.xtext.xtext.wizard/xtend-gen/org/eclipse/xtext/xtext/wizard/PomFile.java

@@ -186,14 +186,20 @@ public class PomFile extends TextFile {
             _builder.append(_artifactId, "\t\t\t");
             _builder.append("</artifactId>");
             _builder.newLineIfNotEmpty();
-            _builder.append("\t");
+            {
-            _builder.append("\t");
+              String _version = dep.getVersion();
-            _builder.append("\t");
+              boolean _tripleNotEquals = (_version != null);
-            _builder.append("<version>");
+              if (_tripleNotEquals) {
-            String _version = dep.getVersion();
+                _builder.append("\t");
-            _builder.append(_version, "\t\t\t");
+                _builder.append("\t");
-            _builder.append("</version>");
+                _builder.append("\t");
-            _builder.newLineIfNotEmpty();
+                _builder.append("<version>");
+                String _version_1 = dep.getVersion();
+                _builder.append(_version_1, "\t\t\t");
+                _builder.append("</version>");
+                _builder.newLineIfNotEmpty();
+              }
+            }
             {
               Scope _scope = dep.getScope();
               boolean _notEquals_1 = (!Objects.equal(_scope, Scope.COMPILE));

org.eclipse.xtext/build.gradle

@@ -4,22 +4,20 @@ description = 'Core component of Xtext.'
 dependencies {
 	compile project(':org.eclipse.xtext.util')
 	compile "org.eclipse.xtend:org.eclipse.xtend.lib:$versions.xtext"
-	compile "log4j:log4j:$versions.log4j"
+	compile 'log4j:log4j'
-	compile "org.eclipse.platform:org.eclipse.equinox.common:$versions.equinoxCommon"
+	compile 'org.eclipse.platform:org.eclipse.equinox.common'
 	// remove me, once the following is fixed : https://bugs.eclipse.org/bugs/show_bug.cgi?id=510504
-	compile "org.eclipse.platform:org.eclipse.osgi:$versions.eclipseOSGI"
+	compile 'org.eclipse.platform:org.eclipse.osgi'
-	compile "org.eclipse.emf:org.eclipse.emf.common:$versions.emfCommon"
+	compile 'org.eclipse.emf:org.eclipse.emf.common'
-	compile "org.eclipse.emf:org.eclipse.emf.ecore.xmi:$versions.emfEcore"
+	compile 'org.eclipse.emf:org.eclipse.emf.ecore.xmi'
-	compile "com.google.inject:guice:$versions.guice"
+	compile 'com.google.inject:guice'
-	compile "org.antlr:antlr-runtime:$versions.antlr"
+	compile 'org.antlr:antlr-runtime'
-	optional("org.eclipse.platform:org.eclipse.core.runtime:$versions.eclipseCore") {
+	optional 'org.eclipse.platform:org.eclipse.core.runtime'
-		exclude group: "org.eclipse.platform", module: "org.eclipse.equinox.common"
+	optional 'org.eclipse.platform:org.eclipse.equinox.registry'
-	}
+	optional 'org.eclipse.emf:org.eclipse.emf.mwe.utils'
-	optional "org.eclipse.platform:org.eclipse.equinox.registry:$versions.equinoxRegistry"
+	optional 'org.eclipse.xpand:org.eclipse.xtend'
-	optional "org.eclipse.emf:org.eclipse.emf.mwe.utils:$versions.emfMwe"
+	optional 'org.eclipse.xpand:org.eclipse.xtend.typesystem.emf'
-	optional "org.eclipse.xpand:org.eclipse.xtend:$versions.xpand"
+	optional 'org.ow2.asm:asm-commons'
-	optional "org.eclipse.xpand:org.eclipse.xtend.typesystem.emf:$versions.xpand"
-	optional "org.ow2.asm:asm-commons:$versions.asm"
 }
 
 sourceSets.main {