Add code formatter plugin

Closes scijava/pom-scijava#85.

Co-authored-by: Curtis Rueden <ctrueden@wisc.edu>

Author: maarzt

pom.xml

@@ -175,6 +175,12 @@
 		-->
 		<scijava.team.roles>founder,lead,developer,debugger,reviewer,support,maintainer</scijava.team.roles>
 
+		<!--
+		The coding-style property defines a coding style to be used in your project.
+		Supported values as of this writing are: imagej, imglib2 and scifio.
+		-->
+		<scijava.coding-style>imagej</scijava.coding-style>
+
 		<!-- Additional configuration -->
 
 		<!-- NB: Avoid platform encoding warning when copying resources. -->
@@ -221,6 +227,8 @@
 
 		<!-- Other Maven plugins -->
 		<dokka-maven-plugin.version>0.9.18</dokka-maven-plugin.version>
+		<formatter-maven-plugin.version>2.8.1</formatter-maven-plugin.version>
+		<impsort-maven-plugin.version>1.2.0</impsort-maven-plugin.version>
 		<jacoco-maven-plugin.version>0.8.2</jacoco-maven-plugin.version>
 		<javafx-maven-plugin.version>8.8.3</javafx-maven-plugin.version>
 		<maven-graph-plugin.version>1.39</maven-graph-plugin.version>
@@ -231,6 +239,7 @@
 		<!-- Plugin dependencies -->
 		<extra-enforcer-rules.version>1.1</extra-enforcer-rules.version>
 		<kotlin.version>1.3.21</kotlin.version>
+		<scijava-coding-style.version>1.0.0</scijava-coding-style.version>
 		<velocity.version>1.7</velocity.version>
 
 		<!-- Build extensions -->
@@ -676,6 +685,40 @@
 						</execution>
 					</executions>
 				</plugin>
+
+				<!-- Formatter Maven Plugin - https://github.com/revelc/formatter-maven-plugin -->
+				<plugin>
+					<groupId>net.revelc.code.formatter</groupId>
+					<artifactId>formatter-maven-plugin</artifactId>
+					<version>${formatter-maven-plugin.version}</version>
+					<dependencies>
+						<dependency>
+							<groupId>org.scijava</groupId>
+							<artifactId>scijava-coding-style</artifactId>
+							<version>${scijava-coding-style.version}</version>
+						</dependency>
+					</dependencies>
+					<configuration>
+						<configFile>eclipse-formatter-settings/${scijava.coding-style}-coding-style.xml</configFile>
+					</configuration>
+				</plugin>
+
+				<!-- ImpSort Maven Plugin - https://github.com/revelc/impsort-maven-plugin -->
+				<plugin>
+					<groupId>net.revelc.code</groupId>
+					<artifactId>impsort-maven-plugin</artifactId>
+					<version>${impsort-maven-plugin.version}</version>
+					<configuration>
+						<groups>java.,javax.,com.,net.,org.</groups>
+						<staticGroups>java,*</staticGroups>
+						<removeUnused>true</removeUnused>
+					</configuration>
+					<executions>
+						<execution>
+							<phase>none</phase>
+						</execution>
+					</executions>
+				</plugin>
 			</plugins>
 		</pluginManagement>
 		<plugins>
@@ -860,6 +903,18 @@
 					</execution>
 				</executions>
 			</plugin>
+
+			<!-- Formatter Maven Plugin - https://github.com/revelc/formatter-maven-plugin -->
+			<plugin>
+				<groupId>net.revelc.code.formatter</groupId>
+				<artifactId>formatter-maven-plugin</artifactId>
+			</plugin>
+
+			<!-- ImpSort Maven Plugin - https://github.com/revelc/impsort-maven-plugin -->
+			<plugin>
+				<groupId>net.revelc.code</groupId>
+				<artifactId>impsort-maven-plugin</artifactId>
+			</plugin>
 		</plugins>
 		<!--
 		We use wagon-webdav-jackrabbit 1.0 for deploys, since it is